This is a late post....i wish that I would have come across this web site earlier. The Juki DU-1181 is a very good walking foot machine but it does mark leather. My wife was able to sew vinyl but veg tan and suede takes a beating. You will most definitely need a good servo motor, the clutch is too fast. I also ended up installing a pulley reducer kit to make speed control more manageable to sew purses and bags. Also note if you purchase on the web as I did, you have no product support. Juki has a Miami location but charges $700 per day for training on adjusting it!! One other problem is the foot height. 15mm (slightly over 1/2") is not sufficient for areas where you have several layers of fabric. I will try a teflon foot and see if it helps prevent marking veg tan leather.....If that doesn't work I think that I'll contact Steve at Leather Machine Co and order the Cobra 4.