Fixed drivetrain hall effects to use the dual hall effect setup.
diff --git a/frc971/constants.h b/frc971/constants.h
index 775ee10..1bf2dc5 100755
--- a/frc971/constants.h
+++ b/frc971/constants.h
@@ -17,7 +17,9 @@
 // Contains the voltages for an analog hall effect sensor on a shifter.
 struct ShifterHallEffect {
   // The numbers to use for scaling raw voltages to 0-1.
-  double high, low;
+  // Low is near 0.0, high is near 1.0
+  double low_gear_middle, low_gear_low;
+  double high_gear_high, high_gear_middle;
 
   // The numbers for when the dog is clear of each gear.
   double clear_high, clear_low;