diff --git a/y2017/constants.h b/y2017/constants.h
index ec8de5d..e8faae1 100644
--- a/y2017/constants.h
+++ b/y2017/constants.h
@@ -32,16 +32,16 @@
     ::frc971::constants::PotAndAbsoluteEncoderZeroingConstants zeroing;
   };
 
-  struct Turret {
-    double pot_offset;
-    ::frc971::constants::PotAndAbsoluteEncoderZeroingConstants zeroing;
-  };
-
   struct Hood {
     double pot_offset;
     ::frc971::constants::EncoderPlusIndexZeroingConstants zeroing;
   };
 
+  struct Column {
+    ::frc971::constants::HallEffectZeroingConstants indexer_zeroing;
+    ::frc971::constants::HallEffectZeroingConstants turret_zeroing;
+  };
+
   static const int kZeroingSampleSize = 200;
 
   static constexpr double kDrivetrainCyclesPerRevolution = 256;
@@ -111,6 +111,8 @@
 
   Intake intake;
 
+  Column column;
+
   Hood hood;
 
   double down_error;