I recently purchased about 55 minifigs via eBay (mostly blacktron I, with maybe a dozen futuron and half a dozen mtron). They're all from store displays apparently, and thus are glued together (helmet to head, head to neck, visor to helmet, legs to torso, and a few have a peg glued to their back for posing I'd assume). Any suggestions on how to go about ungluing them? None of them have airtanks, which I don't mind so much, but I'd like to be able to close their visors (all the blacktron Is are glued open) and perhaps add the airtanks eventually.