diff --git a/sources/2890/mk4i-gear-ratios.png b/sources/2890/mk4i-gear-ratios.png
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diff --git a/sources/2890/swerve-modules.md b/sources/2890/swerve-modules.md
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--- a/sources/2890/swerve-modules.md
+++ b/sources/2890/swerve-modules.md
@@ -38,6 +38,19 @@ Team 2890 uses the **Swerve Drive Specialties MK4i** swerve module. This is the
 
 L1 and L2 are recommended for standard FRC robots. L3 is for lightweight builds only.
 
+### Team 2890 — L1 and L3 (Field-Swappable)
+
+Chris's team runs **L1 and L3 gear sets**, both driven by NEO Vortex motors. Gears swap in the field to change the drive ratio per event or strategy.
+
+| Ratio | Stage 1 | Stage 2 | Stage 3 | Free Speed (Vortex) |
+|-------|---------|---------|---------|---------------------|
+| **L1** | 15T/22T | 20T/26T | 26T/36T | ~14.4 ft/s |
+| **L3** | 15T/22T | 20T/26T | 26T/36T | ~12.8 ft/s |
+
+**L1 = faster, less torque.** **L3 = more torque, slightly slower.** Swap based on game demands — L1 for high-speed defense, L3 for climbing/pushing.
+
+*(Gear ratio diagram: `mk4i-gear-ratios.png`)*
+
 ## Connection to Training
 
 **For students learning swerve:** This module uses a 1/2" hex output shaft. Understanding hex shafts and how they transfer torque is fundamental mechanical knowledge. Students should also understand:
@@ -46,7 +59,7 @@ L1 and L2 are recommended for standard FRC robots. L3 is for lightweight builds
 - How the belt drive multiplies torque from motor to wheel
 
 **Related training modules:**
-- [[motor-basics]] — understandingKv, torque, current relationships
+- [[motor-basics]] — understanding Kv, torque, current relationships
 - [[frc-drivetrain-training]] — swerve kinematics and control
 - [[2890-codebase-index]] — how the code configures these modules
 
@@ -58,4 +71,4 @@ L1 and L2 are recommended for standard FRC robots. L3 is for lightweight builds
 
 ## Notes for MrC
 
-Chris uses these modules with NEO Vortex motors and SPARK Flex controllers. The full stack is: **MK4i + NEO Vortex + SPARK Flex + YAGSL**. The YAGSL library (Yet Another Gyro Library) handles the swerve math and motor control in code.
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+Chris uses these modules with NEO Vortex motors and SPARK Flex controllers. The full stack is: **MK4i + NEO Vortex + SPARK Flex + YAGSL**. The YAGSL library (Yet Another Gyro Library) handles the swerve math and motor control in code.