Halfway through cutting a 12x1.25mm thread in some stainless last night all the magic smoke suddenly poured out of what I thought was the motor. Turned it off, turned it back on in forward and it worked, turned off then into reverse and nothing. But forward still worked. So, after removing the motor and dismantling it I couldnt find anything looking like a burnt patch or any discolouration. Reassembled but not installed I plugged it back in and it worked in forward and reverse, Hmmm. (no load on the motor) It could still be a burnt spot somewhere in the winding though I guess. Checking the change gears it looked as if at one point in the revolution the small 30 tooth on the leadscrew shaft stuck, ie, the backlash was too great and the teeth tops hit the teeth tops of the 120 gear. So, obviously my fault so I attempted to turn the lead screw by hand by just twisting the gears (no handle) and it was easy so thats all right. Engaged the half nuts and tried to turn by hand but no such luck. Disengaged the half nuts and engaged the apron drive, this worked but was not easy. Went back to the half nuts and tried them again. It worked but was incredibly stiff and difficult. Can anyone here try to move their saddle with the half nuts engaged and turning the gear by hand and report back how difficult it was? Many thanks.