Calibrate competition robot sensors.

Change-Id: I5504e727666758f67b0b8ff9b70a93264b0293ae
diff --git a/y2018/control_loops/superstructure/arm/arm.h b/y2018/control_loops/superstructure/arm/arm.h
index a39b550..4609827 100644
--- a/y2018/control_loops/superstructure/arm/arm.h
+++ b/y2018/control_loops/superstructure/arm/arm.h
@@ -26,8 +26,8 @@
     return kGrannyMode() ? 4.0 : 12.0;
   }
   static constexpr double kDt() { return 0.00505; }
-  static constexpr double kAlpha0Max() { return kGrannyMode() ? 10.0 : 15.0; }
-  static constexpr double kAlpha1Max() { return kGrannyMode() ? 10.0 : 15.0; }
+  static constexpr double kAlpha0Max() { return kGrannyMode() ? 10.0 : 10.0; }
+  static constexpr double kAlpha1Max() { return kGrannyMode() ? 10.0 : 10.0; }
 
   static constexpr double kVMax() { return kGrannyMode() ? 5.0 : 11.5; }
   static constexpr double kPathlessVMax() { return 5.0; }