Recently upgraded my V-Core 3 to a 3.1, in addition to giving it the extrusionless gantry mod. Finally getting around to recalibration and suddenly I'm seeing my extruder my extruder skipping when retracting. I don't recall this happening before the upgrade, and I didn't change any of the electronics relating to my extruder, so I'm wondering if anyone has any ideas on what could be causing this?