Upload & Sell: Off
suggestion: after you have pressed the bellow's front against the lens, wrap a strong rubber band around the lens bellows several times and tie-off to keep the bellow from moving forward. a medical rubber band for exercise is excellent in this application.
of course, the lens in used will need to be of internal focus (IF) design where the filter mount does not rotate during af.
may your gears stay dry while you are all wet.... ;-)