diff --git a/HansonServo.ino b/HansonServo.ino
index 0c8e6c4..69e483e 100644
--- a/HansonServo.ino
+++ b/HansonServo.ino
@@ -137,8 +137,9 @@ void setup() {
 
   // anim.saveToFile("/scurve.anim");
   // Serial.println("SAVED");
-   handleSaveFile(testPayload, testPayloadLength);
-   anim.loadFromFile("/pointcurve2.anim");
+   //handleSaveFile(testPayload, testPayloadLength);
+   Serial.println("Loading test.anim");
+   anim.loadFromFile("/test.anim");
    Serial.println(anim.header.frameCount);
    anim.printCurves();
   // Serial.print("CurveSegment size: ");
diff --git a/animation.cpp b/animation.cpp
index caca1ff..a353112 100644
--- a/animation.cpp
+++ b/animation.cpp
@@ -29,7 +29,7 @@ uint16_t Animation::getMotorPosition(uint8_t motorID, uint16_t timeCS) {
   for (const auto& seg : curves[motorID]) {
     if (timeCS >= seg.startTime && timeCS <= seg.endTime) {
       // Convert uint16_t to float in range -1 to 1
-      auto toFloat = [](uint16_t v) {
+      auto toFloat = [](int16_t v) {
         return (float(v) / 65535.0f) * 2.0f - 1.0f;
       };
 
diff --git a/animation.h b/animation.h
index 0796da8..fde2ee6 100644
--- a/animation.h
+++ b/animation.h
@@ -25,12 +25,12 @@ struct __attribute__((packed)) CurveSegment {
   uint16_t startTime;// centiseconds (0.01s) MAX 655.35 seconds
   uint16_t endTime;// centiseconds (0.01s) MAX 655.35 seconds
   // remapped from -1 to 1 → 0–65535
-  uint16_t startPointY;
+  int16_t startPointY;
   uint16_t startHandleX;
-  uint16_t startHandleY;
+  int16_t startHandleY;
   uint16_t endHandleX;
-  uint16_t endHandleY;
-  uint16_t endPointY;
+  int16_t endHandleY;
+  int16_t endPointY;
 };