I'm not Michael, but I wanted to jump in and say I love my Martelli rotary...wish I had gotten a leftie also, maybe next QuiltFest! Blade seems to stay sharper longer, and your hand doesn't get as tired when you are doing "production" cutting because the pressure is so much less even with up to 3 or 4 layers. The demo at the shows have many more layers, but I can't seem to manage to keep them from creeping when I do them at home! (Jacksonville, fl)