Just finished playing, changed it to 1/4 stepping at 8mtr/min, sounds and runs perfect at that, did manage to get it upto 12m but then it stalled sometimes all the way back down to 10. Runs nice at 10 without stalling, but safe at 8, so happy:) Ive just hit a small snag now with resonance at one end of the gantry due to one of the bolts holding the round rail to the ali rail support being a bit loose - no biggie tho, can sort that, very happy. Cheers