I have a 3d printer I built which is all metal with no backlash. Recently upgraded the x and y axis with mechaduino closed loop And reflashed the firmware to siut. The printer runs ok but circles are oval and oblong. Now I checked the axis movement with a dial test indicator and found that I have a 0.5 backlash in both axis... this was not the case before I fitted the mechaduinos. When I put the new Repetier firmware, i think that I Enabled Backlash... i am at a loss what is going on... any clues? Maybe because I gave backlash enabled?