Index: firmware/App/Controllers/Valves.h
===================================================================
diff -u -r8b819deb3e770c981eed221f63170dd842eedbe3 -r8de3c971a08a5e2d822a6a1d1d1c477b6d4cbd5b
--- firmware/App/Controllers/Valves.h	(.../Valves.h)	(revision 8b819deb3e770c981eed221f63170dd842eedbe3)
+++ firmware/App/Controllers/Valves.h	(.../Valves.h)	(revision 8de3c971a08a5e2d822a6a1d1d1c477b6d4cbd5b)
@@ -40,6 +40,7 @@
     VALVE_POSITION_A_INSERT_EJECT,      ///< Position A, Insert/Eject
     VALVE_POSITION_B_OPEN,              ///< Position B, Open
     VALVE_POSITION_C_CLOSE,             ///< Position C, Close
+    VALVE_POSITION_D_VENOUS,            ///< Position D, Venous
     NUM_OF_VALVE_POSITIONS,             ///< Number of valve positions
 } VALVE_POSITION_T;
 
@@ -52,9 +53,9 @@
     U32 currentPosID;                  ///< Current position (enum)
     S16 currentPos;                    ///< Current position in encoder counts
     S16 cmdPos;                        ///< Commanded position (enum)
-    S16 posA;
-    S16 posB;
-    S16 posC;
+    S16 posA;                          ///< Position A (count)
+    S16 posB;                          ///< Position B (count)
+    S16 posC;                          ///< Position C (count)
 } TD_VALVE_DATA_T;
 #pragma pack(pop)