I've mocked up a gantry side for R&P the motor will sit on a plate on the side of the gantry. The plate is bolted through the top right corner whilst on the left is a bolt with a sliding hole in. Bottom left corner I have a tension spring keeping the motor and pinion into te rack and quite snug! Will this still cause inaccuracy problems? I will try get a pic tomorrow...... Although I can't get my mind off this damn thing so might pop down to the unit lol