I have both Olfa and Gingher ergonomic rotary cutters - try not to do too much cutting at one time. As someone else stated, repetitive movement will hurt and isn't good. I've already had carpal tunnel surgery, have a little arthritis in my hands and get trigger finger on and off. I do believe cutting is the least favorite part of the quilting process for me. I've bought precuts before but also fabric off the bolt.