I haven't had a chance to skate on the roller XXV's yet. Won't be able to until my game tomorrow. That will also be my first time on Revisions so we'll see how that goes... As for mounting a hummer I'm sure not much would be needed as there are cutouts already on the bottom of the boot. Once the holder is removed you'll see what I'm talking about. You're going to have to drill new holes regardless. I don't know of any roller frame that uses the same hole pattern as the LS2.