I recently replaced the carriage unit and the carrier cable on my MH Refine 1351. When it goes to cut, it drags the blade to the first cut and when it is done, it drags it back to "home base." I have tried adjusting the downforce and the blade height and it doesn't seem to help much. The new carrier unit is different than my old one, as my old one had a 2 position carrier arm whereas this one only has one. The drivers seem to work ok as it cuts everything I have on screen.