diff --git a/src/data/layers/metal.tsx b/src/data/layers/metal.tsx
index bf80c30..e74aeb1 100644
--- a/src/data/layers/metal.tsx
+++ b/src/data/layers/metal.tsx
@@ -112,6 +112,11 @@ const layer = createLayer(id, function (this: BaseLayer) {
             exponent: 1.1,
             description: "Mary Level 2",
             enabled: management.elfTraining.heatedPlanterElfTraining.milestones[1].earned
+        })),
+        createExponentialModifier(() => ({
+            exponent: 1.2,
+            description: "100% Sleigh Fixed",
+            enabled: sleigh.milestones.milestone8.earned
         }))
     ]);
     const computedOrePurity = computed(() => orePurity.apply(0.1));
@@ -183,6 +188,11 @@ const layer = createLayer(id, function (this: BaseLayer) {
             description: "Jazzy Wrapping Paper",
             enabled: computed(() => Decimal.gt(wrappingPaper.boosts.jazzy1.value, 1))
         })),
+        createMultiplicativeModifier(() => ({
+            multiplier: 2,
+            description: "30% Sleigh Fixed",
+            enabled: sleigh.milestones.milestone4.earned
+        })),
         createAdditiveModifier(() => ({
             addend: () => Decimal.sub(lastOreGained.value, lastOreSmelted.value).max(0),
             description: "Metal Decoration",
@@ -292,6 +302,11 @@ const layer = createLayer(id, function (this: BaseLayer) {
             description: "1000 Letters Processed",
             enabled: letters.milestones.miningMilestone.earned
         })),
+        createMultiplicativeModifier(() => ({
+            multiplier: 2,
+            description: "30% Sleigh Fixed",
+            enabled: sleigh.milestones.milestone4.earned
+        })),
         createMultiplicativeModifier(() => ({
             multiplier: () => Decimal.add(toys.clothes.value, 1),
             description: "Give elves clothes to wear",
diff --git a/src/data/layers/plastic.tsx b/src/data/layers/plastic.tsx
index 3915031..6023a10 100644
--- a/src/data/layers/plastic.tsx
+++ b/src/data/layers/plastic.tsx
@@ -321,6 +321,14 @@ const layer = createLayer(id, function (this: BaseLayer) {
             description: "Oil Refinery",
             enabled: () => Decimal.gt(activeRefinery.value, 0)
         })),
+        createAdditiveModifier(() => ({
+            addend: () =>
+            management.elfTraining.oilElfTraining.milestones[3].earned.value
+                ? Decimal.times(Decimal.div(sleigh.sleighProgress.value.value,2).floor(), 200)
+                : Decimal.times(activeRefinery.value, 40),
+            description: "75% Sleigh Fixed",
+            enabled: sleigh.milestones.milestone7.earned
+        })),
         createMultiplicativeModifier(() => ({
             multiplier: 2,
             description: "Paper Elf Recruitment",
@@ -386,6 +394,16 @@ const layer = createLayer(id, function (this: BaseLayer) {
             multiplier: () => dyes.boosts.white1.value,
             description: "White Dye Boost"
         })),
+        createMultiplicativeModifier(() => ({
+            multiplier: () => Decimal.div(sleigh.sleighProgress.value.value, 5).floor().mul(0.05).add(1),
+            description: "20% Sleigh Fixed",
+            enabled: sleigh.milestones.milestone3.earned
+        })),
+        createMultiplicativeModifier(() => ({
+            multiplier: 4,
+            description: "40% Sleigh Fixed",
+            enabled: sleigh.milestones.milestone5.earned
+        })),
         reindeer.reindeer.blitzen.modifier
     ]);
     const computedPlasticGain = computed(() => plasticGain.apply(0));
diff --git a/src/data/layers/sleigh.tsx b/src/data/layers/sleigh.tsx
index 93247e9..35bfc71 100644
--- a/src/data/layers/sleigh.tsx
+++ b/src/data/layers/sleigh.tsx
@@ -43,9 +43,9 @@ const layer = createLayer(id, function (this: BaseLayer) {
     const sleighCost = computed(() => {
         let v = sleighProgress.value.value;
         return {
-            wood: Decimal.mul(1e60, Decimal.pow(1.2, v)),
-            metal: Decimal.mul(1e40, Decimal.pow(1.1, v)),
-            plastic: Decimal.mul(1e10, Decimal.pow(1.05, v))
+            wood: Decimal.mul(1e97, Decimal.pow(1.2, v)),
+            metal: Decimal.mul(1e67, Decimal.pow(1.1, v)),
+            plastic: Decimal.mul(1e22, Decimal.pow(1.05, v))
         };
     });
     const sleigh = createBuyable(() => ({
@@ -55,7 +55,7 @@ const layer = createLayer(id, function (this: BaseLayer) {
                 <br />
                 <br />
                 <span style="font-size: large">
-                    Cost: {displayCost(trees.logs, sleighCost.value.wood, "logs")},
+                    Requires: {displayCost(trees.logs, sleighCost.value.wood, "logs")},
                     {displayCost(metal.metal, sleighCost.value.metal, "metal")},
                     {displayCost(plastic.plastic, sleighCost.value.plastic, "plastic")}
                 </span>
@@ -111,7 +111,7 @@ const layer = createLayer(id, function (this: BaseLayer) {
     const milestone5 = createMilestone(() => ({
         display: {
             requirement: "40% Sleigh Fixed",
-            effectDisplay: "Plastic gain is doubled"
+            effectDisplay: "Plastic gain is quadrupled"
         },
         shouldEarn: () => Decimal.gte(sleighProgress.value.value, 40),
         showPopups: shouldShowPopups
@@ -127,7 +127,7 @@ const layer = createLayer(id, function (this: BaseLayer) {
     const milestone7 = createMilestone(() => ({
         display: {
             requirement: "75% Sleigh Fixed",
-            effectDisplay: "Gain 10 extra refineries for every 2% of sleigh fixed"
+            effectDisplay: "Gain 40 extra refineries for every 2% of sleigh fixed"
         },
         shouldEarn: () => Decimal.gte(sleighProgress.value.value, 75),
         showPopups: shouldShowPopups
diff --git a/src/data/layers/trees.tsx b/src/data/layers/trees.tsx
index d121bcd..a0cdfed 100644
--- a/src/data/layers/trees.tsx
+++ b/src/data/layers/trees.tsx
@@ -559,6 +559,16 @@ const layer = createLayer(id, function (this: BaseLayer) {
             description: "Haul wood in trucks",
             enabled: factory.upgrades[0][2].bought
         })),
+        createMultiplicativeModifier(() => ({
+            multiplier: () => Decimal.div(sleigh.sleighProgress.value.value, 5).floor().mul(0.05).add(1),
+            description: "10% Sleigh Fixed",
+            enabled: sleigh.milestones.milestone2.earned
+        })),
+        createMultiplicativeModifier(() => ({
+            multiplier: 10,
+            description: "50% Sleigh Fixed",
+            enabled: sleigh.milestones.milestone6.earned
+        })),
         reindeer.reindeer.dasher.modifier,
         createExponentialModifier(() => ({
             exponent: 1.2,