I've got a Bosch Colt trim router that works great but changing bits gives me a fit. The little red button that is supposed to lock the shaft so one can loosen the collet is hard for me to hold in place and loosen the collet at the same time. I have a problem with arthritis in my hands. It's a major chore every time and I'm starting to avoid using it for that reason. Any one have that problem or know what to do? Except for that I really love using the little bugger.