diff --git a/client/src/pages/spools/create.tsx b/client/src/pages/spools/create.tsx
index aea54e7..ecdd65a 100644
--- a/client/src/pages/spools/create.tsx
+++ b/client/src/pages/spools/create.tsx
@@ -29,6 +29,7 @@ import utc from "dayjs/plugin/utc";
 import { getCurrencySymbol, useCurrency } from "../../utils/settings";
 import { ExternalFilament, useGetExternalDBFilaments } from "../../utils/queryExternalDB";
 import { createFilamentFromExternal } from "../filaments/functions";
+import { formatFilamentLabel, useGetFilamentSelectOptions } from "./functions";
 
 dayjs.extend(utc);
 
@@ -40,23 +41,6 @@ type ISpoolRequest = Omit<ISpoolParsedExtras, "id" | "registered"> & {
   filament_id: number | string;
 };
 
-function formatFilamentLabel(name: string, diameter: number, vendorName?: string, material?: string, weight?: number) {
-  const portions = [];
-  if (vendorName) {
-    portions.push(vendorName);
-  }
-  portions.push(name);
-  const extras = [];
-  if (material) {
-    extras.push(material);
-  }
-  extras.push(formatLength(diameter));
-  if (weight) {
-    extras.push(formatWeight(weight));
-  }
-  return `${portions.join(" - ")} (${extras.join(", ")})`;
-}
-
 /**
  * Performs a case-insensitive search for the given query in the given string.
  * The query is broken down into words and the search is performed on each word.
@@ -70,7 +54,6 @@ export const SpoolCreate: React.FC<IResourceComponentsProps & CreateOrCloneProps
   const t = useTranslate();
   const extraFields = useGetFields(EntityType.spool);
   const currency = useCurrency();
-  const externalFilaments = useGetExternalDBFilaments();
 
   const { form, formProps, formLoading, onFinish, redirect } = useForm<
     ISpool,
@@ -107,12 +90,25 @@ export const SpoolCreate: React.FC<IResourceComponentsProps & CreateOrCloneProps
     formProps.initialValues.filament_id = parseInt(filament_id);
   }
 
+  //
+  // Set up the filament selection options
+  //
+  const { options: filamentOptions, getById, allExternalFilaments } = useGetFilamentSelectOptions();
+
+  const selectedFilamentID = Form.useWatch("filament_id", form);
+  const selectedFilament = getById(selectedFilamentID);
+
+  //
+  // Submit handler
+  //
+
   const handleSubmit = async (redirectTo: "list" | "edit" | "create") => {
     const values = StringifiedExtras(await form.validateFields());
-    if (typeof values.filament_id === "string") {
+    const selectOption = getById(values.filament_id);
+    if (selectOption?.is_internal === false) {
       // Filament ID being a string indicates its an external filament.
       // If so, we should first create the internal filament version, then create the spool(s)
-      const externalFilament = externalFilaments.data?.find((f) => f.id === values.filament_id);
+      const externalFilament = allExternalFilaments?.find((f) => f.id === values.filament_id);
       if (!externalFilament) {
         throw new Error("Unknown external filament");
       }
@@ -131,10 +127,6 @@ export const SpoolCreate: React.FC<IResourceComponentsProps & CreateOrCloneProps
     redirect(redirectTo);
   };
 
-  const { queryResult: filamentsQuery } = useSelect<IFilament>({
-    resource: "filament",
-  });
-
   // Use useEffect to update the form's initialValues when the extra fields are loaded
   // This is necessary because the form is rendered before the extra fields are loaded
   React.useEffect(() => {
@@ -146,72 +138,6 @@ export const SpoolCreate: React.FC<IResourceComponentsProps & CreateOrCloneProps
     });
   }, [form, extraFields.data, formProps.initialValues]);
 
-  //
-  // Set up the filament selection options
-  //
-
-  interface SelectOption {
-    label: string;
-    value: string | number;
-    weight?: number;
-    spool_weight?: number;
-    is_internal: boolean;
-  }
-
-  const filamentSelectInternal: SelectOption[] | undefined = filamentsQuery.data?.data.map((item) => {
-    return {
-      label: formatFilamentLabel(
-        item.name ?? `ID ${item.id}`,
-        item.diameter,
-        item.vendor?.name,
-        item.material,
-        item.weight
-      ),
-      value: item.id,
-      weight: item.weight,
-      spool_weight: item.spool_weight,
-      is_internal: true,
-    };
-  });
-  filamentSelectInternal?.sort((a, b) => a.label.localeCompare(b.label, undefined, { sensitivity: "base" }));
-
-  const filamentSelectExternal: SelectOption[] | undefined = externalFilaments.data?.map((item) => {
-    return {
-      label: formatFilamentLabel(item.name, item.diameter, item.manufacturer, item.material, item.weight),
-      value: item.id,
-      weight: item.weight,
-      spool_weight: item.spool_weight || undefined,
-      is_internal: false,
-    };
-  });
-  filamentSelectExternal?.sort((a, b) => a.label.localeCompare(b.label, undefined, { sensitivity: "base" }));
-
-  const filamentSelectOptions = [
-    {
-      label: <span>{t("spool.fields.filament_internal")}</span>,
-      options: filamentSelectInternal ?? [],
-    },
-    {
-      label: <span>{t("spool.fields.filament_external")}</span>,
-      options: filamentSelectExternal ?? [],
-    },
-  ];
-
-  const selectedFilamentID: number | string | undefined = Form.useWatch("filament_id", form);
-  let selectedFilament: SelectOption | null = null;
-  // selectedFilamentID is a number of it's an internal filament, and a string of it's an external filament.
-  if (typeof selectedFilamentID === "number") {
-    selectedFilament =
-      filamentSelectInternal?.find((obj) => {
-        return obj.value === selectedFilamentID;
-      }) ?? null;
-  } else if (typeof selectedFilamentID === "string") {
-    selectedFilament =
-      filamentSelectExternal?.find((obj) => {
-        return obj.value === selectedFilamentID;
-      }) ?? null;
-  }
-
   //
   // Weight calculations
   //
@@ -220,17 +146,11 @@ export const SpoolCreate: React.FC<IResourceComponentsProps & CreateOrCloneProps
   const [usedWeight, setUsedWeight] = useState(0);
 
   React.useEffect(() => {
-    const initial_weight = initialWeightValue ?? 0;
-    const spool_weight = spoolWeightValue ?? 0;
-
     const newFilamentWeight = selectedFilament?.weight || 0;
     const newSpoolWeight = selectedFilament?.spool_weight || 0;
-
-    const currentCalculatedFilamentWeight = selectedFilament ? calcTotalWeight(selectedFilament) : 0;
     if (newFilamentWeight > 0) {
       form.setFieldValue("initial_weight", newFilamentWeight);
     }
-
     if (newSpoolWeight > 0) {
       form.setFieldValue("spool_weight", newSpoolWeight);
     }
@@ -274,10 +194,6 @@ export const SpoolCreate: React.FC<IResourceComponentsProps & CreateOrCloneProps
     return net_weight + spool_weight;
   };
 
-  function calcTotalWeight(filament: SelectOption): number {
-    return (filament.weight ?? 0) + (filament.spool_weight ?? 0);
-  }
-
   const getMeasuredWeight = (): number => {
     const grossWeight = getGrossWeight();
 
@@ -390,7 +306,7 @@ export const SpoolCreate: React.FC<IResourceComponentsProps & CreateOrCloneProps
           ]}
         >
           <Select
-            options={filamentSelectOptions}
+            options={filamentOptions}
             showSearch
             filterOption={(input, option) =>
               typeof option?.label === "string" && selectSearchMatches(input, option?.label)
diff --git a/client/src/pages/spools/functions.ts b/client/src/pages/spools/functions.ts
deleted file mode 100644
index 1ba9092..0000000
--- a/client/src/pages/spools/functions.ts
+++ /dev/null
@@ -1,16 +0,0 @@
-import { getAPIURL } from "../../utils/url";
-import { ISpool } from "./model";
-
-export async function setSpoolArchived(spool: ISpool, archived: boolean) {
-  const init: RequestInit = {
-    method: "PATCH",
-    headers: {
-      "Content-Type": "application/json",
-    },
-    body: JSON.stringify({
-      archived: archived,
-    }),
-  };
-  const request = new Request(getAPIURL() + "/spool/" + spool.id);
-  await fetch(request, init);
-}
diff --git a/client/src/pages/spools/functions.tsx b/client/src/pages/spools/functions.tsx
new file mode 100644
index 0000000..51d580e
--- /dev/null
+++ b/client/src/pages/spools/functions.tsx
@@ -0,0 +1,127 @@
+import { useSelect, useTranslate } from "@refinedev/core";
+import { formatLength, formatWeight } from "../../utils/parsing";
+import { getAPIURL } from "../../utils/url";
+import { ISpool } from "./model";
+import { IFilament } from "../filaments/model";
+import { useGetExternalDBFilaments } from "../../utils/queryExternalDB";
+
+export async function setSpoolArchived(spool: ISpool, archived: boolean) {
+  const init: RequestInit = {
+    method: "PATCH",
+    headers: {
+      "Content-Type": "application/json",
+    },
+    body: JSON.stringify({
+      archived: archived,
+    }),
+  };
+  const request = new Request(getAPIURL() + "/spool/" + spool.id);
+  await fetch(request, init);
+}
+
+/**
+ * Formats a filament label with the given parameters.
+ */
+export function formatFilamentLabel(
+  name: string,
+  diameter: number,
+  vendorName?: string,
+  material?: string,
+  weight?: number
+): string {
+  const portions = [];
+  if (vendorName) {
+    portions.push(vendorName);
+  }
+  portions.push(name);
+  const extras = [];
+  if (material) {
+    extras.push(material);
+  }
+  extras.push(formatLength(diameter));
+  if (weight) {
+    extras.push(formatWeight(weight));
+  }
+  return `${portions.join(" - ")} (${extras.join(", ")})`;
+}
+
+interface SelectOption {
+  label: string;
+  value: string | number;
+  weight?: number;
+  spool_weight?: number;
+  is_internal: boolean;
+}
+
+export function useGetFilamentSelectOptions() {
+  // Setup hooks
+  const t = useTranslate();
+  const { queryResult: internalFilaments } = useSelect<IFilament>({
+    resource: "filament",
+  });
+  const externalFilaments = useGetExternalDBFilaments();
+
+  // Format and sort internal filament options
+  const filamentSelectInternal: SelectOption[] =
+    internalFilaments.data?.data.map((item) => {
+      return {
+        label: formatFilamentLabel(
+          item.name ?? `ID ${item.id}`,
+          item.diameter,
+          item.vendor?.name,
+          item.material,
+          item.weight
+        ),
+        value: item.id,
+        weight: item.weight,
+        spool_weight: item.spool_weight,
+        is_internal: true,
+      };
+    }) ?? [];
+  filamentSelectInternal.sort((a, b) => a.label.localeCompare(b.label, undefined, { sensitivity: "base" }));
+
+  // Format and sort external filament options
+  const filamentSelectExternal: SelectOption[] =
+    externalFilaments.data?.map((item) => {
+      return {
+        label: formatFilamentLabel(item.name, item.diameter, item.manufacturer, item.material, item.weight),
+        value: item.id,
+        weight: item.weight,
+        spool_weight: item.spool_weight || undefined,
+        is_internal: false,
+      };
+    }) ?? [];
+  filamentSelectExternal.sort((a, b) => a.label.localeCompare(b.label, undefined, { sensitivity: "base" }));
+
+  return {
+    options: [
+      {
+        label: <span>{t("spool.fields.filament_internal")}</span>,
+        options: filamentSelectInternal,
+      },
+      {
+        label: <span>{t("spool.fields.filament_external")}</span>,
+        options: filamentSelectExternal,
+      },
+    ],
+    getById: (id: number | string | null) => {
+      // id is a number of it's an internal filament, and a string of it's an external filament.
+      if (typeof id === "number") {
+        return (
+          filamentSelectInternal?.find((obj) => {
+            return obj.value === id;
+          }) ?? null
+        );
+      } else if (typeof id === "string") {
+        return (
+          filamentSelectExternal?.find((obj) => {
+            return obj.value === id;
+          }) ?? null
+        );
+      } else {
+        return null;
+      }
+    },
+    allExternalFilaments: externalFilaments.data,
+  };
+}