I want to bring over my camcorder when you try to force fluid from the nipple up to the MC with a Mity-Vac, should be really entertaining! To do this you have to make an adapter to go on top of the MC, apply vacuum and suck it up. With just the Mity-Vac you fill the reservoir and pull it down and out the nipple.No draining/flushing involved, just empty the reservoir with a turkey baster, put teflon tape around the nipple threads, attach Mity-Vac, fill reservoir, and suck away. When the fluid coming out turns clear (or whatever color fluid you use) you know you are done...