Hi, I was looking at the progress and the Mergress. The Mergress has a metal knob. However, the mergress does not address the problem in the handle. The handle is still pretty slippers. I was wondering if any of you guys have a solution to the slippery handle. I was wondering if there is a way to put a handle similar to the 34c HD to the mergress to improve the grip and still have the adjustability of the mergress.