I just finished my first ever pickup install. I put a set of Model Js in my Jazz. Went okay and sounds great but I have a question. Dimarzio says to cut a piece of the foam that comes with the pickups to put underneath and not to use the existing foam because their pickups are taller than normal and there's less room for the foam. Okay, I did that. My question is, should I be able to push down on the pickup and feel it move? I rest my thumb on the pickup most of the time and I never noticed my old pickup moving when I did that. Maybe I need to put more foam underneath?