diff --git a/server/src/score-import/framework/calculated-data/game-specific-stats.ts b/server/src/score-import/framework/calculated-data/game-specific-stats.ts
index b8bcc6deb..4a9bc5ec8 100644
--- a/server/src/score-import/framework/calculated-data/game-specific-stats.ts
+++ b/server/src/score-import/framework/calculated-data/game-specific-stats.ts
@@ -259,3 +259,11 @@ export function CalculateVF5(
 
     return Math.floor(level * 2 * percent * gradeCoefficient * lampCoefficient) / 100;
 }
+
+// function CalculateJubility(
+//     dryScore: DryScore<"jubeat:Single">,
+//     chartData: AnyChartDocument,
+//     logger: Logger
+// ) {
+//     let rate = dryScore.calculatedData.gameSpecific.musicRate; eurgh, this is hard.
+// }
diff --git a/server/src/score-import/framework/user-game-stats/builtin-class-handlers.ts b/server/src/score-import/framework/user-game-stats/builtin-class-handlers.ts
new file mode 100644
index 000000000..28186308a
--- /dev/null
+++ b/server/src/score-import/framework/user-game-stats/builtin-class-handlers.ts
@@ -0,0 +1,63 @@
+import { Game, Playtypes, integer } from "kamaitachi-common";
+
+export function CalculateGitadoraColour(
+    game: Game,
+    playtype: Playtypes[Game],
+    userID: integer,
+    customRatings: Record<string, number>
+): Record<string, string> {
+    let skillColour = GitadoraSkillToColour(customRatings.skill);
+
+    return {
+        skillColour,
+    };
+}
+
+function GitadoraSkillToColour(sk: number) {
+    if (sk >= 8500) {
+        return "rainbow";
+    } else if (sk >= 8000) {
+        return "gold";
+    } else if (sk >= 7500) {
+        return "silver";
+    } else if (sk >= 7000) {
+        return "bronze";
+    } else if (sk >= 6500) {
+        return "redgradient";
+    } else if (sk >= 6000) {
+        return "red";
+    } else if (sk >= 5500) {
+        return "purplegradient";
+    } else if (sk >= 5000) {
+        return "purple";
+    } else if (sk >= 4500) {
+        return "bluegradient";
+    } else if (sk >= 4000) {
+        return "blue";
+    } else if (sk >= 3500) {
+        return "greengradient";
+    } else if (sk >= 3000) {
+        return "green";
+    } else if (sk >= 2500) {
+        return "yellowgradient";
+    } else if (sk > 2000) {
+        return "yellow";
+    } else if (sk > 1500) {
+        return "orangegradient";
+    } else if (sk > 1000) {
+        return "orange";
+    }
+
+    return "white";
+}
+
+export function CalculateJubeatColour(
+    game: Game,
+    playtype: Playtypes[Game],
+    userID: integer,
+    customRatings: Record<string, number>
+): Promise<Record<string, string>> {
+    throw new Error("Not implemented.");
+}
+
+function JubilityToColour(jb: number) {}
diff --git a/server/src/score-import/framework/user-game-stats/classes.ts b/server/src/score-import/framework/user-game-stats/classes.ts
index b0f4bea0b..40c9faa3e 100644
--- a/server/src/score-import/framework/user-game-stats/classes.ts
+++ b/server/src/score-import/framework/user-game-stats/classes.ts
@@ -3,6 +3,7 @@ import { gameClassValues, ClassData } from "kamaitachi-common/js/game-classes";
 import deepmerge from "deepmerge";
 import db from "../../../db/db";
 import { KtLogger } from "../../../types";
+import { CalculateGitadoraColour, CalculateJubeatColour } from "./builtin-class-handlers";
 
 export interface ClassHandler {
     (
@@ -10,7 +11,7 @@ export interface ClassHandler {
         playtype: Playtypes[Game],
         userID: integer,
         customRatings: Record<string, number>
-    ): Promise<Record<string, string>>;
+    ): Promise<Record<string, string>> | Record<string, string>;
 }
 
 type ClassHandlerMap = {
@@ -21,28 +22,6 @@ type ClassHandlerMap = {
         | null;
 };
 
-// stub functions, see githubissues
-
-// eslint-disable-next-line require-await
-async function CalculateGitadoraColour(
-    game: Game,
-    playtype: Playtypes[Game],
-    userID: integer,
-    customRatings: Record<string, number>
-): Promise<Record<string, string>> {
-    throw new Error("Not implemented.");
-}
-
-// eslint-disable-next-line require-await
-async function CalculateJubeatColour(
-    game: Game,
-    playtype: Playtypes[Game],
-    userID: integer,
-    customRatings: Record<string, number>
-): Promise<Record<string, string>> {
-    throw new Error("Not implemented.");
-}
-
 /**
  * Describes the "Default" class handlers for a game, I.E. ones that are
  * always meant to be called when new scores are found.
diff --git a/server/src/score-import/framework/user-game-stats/rating.ts b/server/src/score-import/framework/user-game-stats/rating.ts
index 486e91959..6a09cc2b4 100644
--- a/server/src/score-import/framework/user-game-stats/rating.ts
+++ b/server/src/score-import/framework/user-game-stats/rating.ts
@@ -119,8 +119,23 @@ const CUSTOM_RATING_FUNCTIONS = {
             MFCP: LazySumAll("MFCP"),
         },
     },
+    gitadora: {
+        Gita: CalculateGitadoraSkill,
+    },
 };
 
+async function CalculateGitadoraSkill(
+    game: Game,
+    playtype: Playtypes[Game],
+    userID: integer,
+    logger: KtLogger
+) {
+    // let hotCharts = fetchfolder("gitadora_hot");
+    // select best 25 scores on hotcharts
+    // select best 25 scores not on hot charts ("gitadora_nothot?")
+    // sum.
+}
+
 export async function CalculateCustomRatings(
     game: Game,
     playtype: Playtypes[Game],