Index: firmware/App/HDCommon.h
===================================================================
diff -u -r1d4c54fbbb65fbead24ac16e1dece4c1df84b39d -r39bd83ee1d4898c4d244410933dc6f23d42b0c9c
--- firmware/App/HDCommon.h	(.../HDCommon.h)	(revision 1d4c54fbbb65fbead24ac16e1dece4c1df84b39d)
+++ firmware/App/HDCommon.h	(.../HDCommon.h)	(revision 39bd83ee1d4898c4d244410933dc6f23d42b0c9c)
@@ -49,7 +49,7 @@
 //    #define RUN_BP_OPEN_LOOP                1           // Run blood pump in open loop mode
 //    #define RUN_DPI_OPEN_LOOP               1           // Run dialysate inlet pump in open loop mode
     #define WORN_OUT_CARTRIDGE              1           // Running with an old worn out cartridge (max wear)
-//    #define PBA_ESTIMATION                  1           // Estimate arterial pressure rather than look at PBA sensor
+    #define PBA_ESTIMATION                  1           // Estimate arterial pressure rather than look at PBA sensor
     #define DISABLE_MOTOR_CURRENT_CHECKS    1           // Do not error on HD pump current checks
     #define DISABLE_PUMP_FLOW_CHECKS        1           // Do not error on HD pump flow checks
     #define DISABLE_PUMP_SPEED_CHECKS       1           // Do not error on HD pump speed checks