This one, I think, is going to work a lot better than the last one. Print with no support, wrap rubberbands around each of the posts (rubber band will make a 90 degree twist) pull it back and FIRE! fires anything that fits but im working on a "bolt" for it now (will upload later) The inner piece is supported by tiny squares and should break loose easily. Everything else has been designed to not need support Hope it works! This is for the reddit /r/3dprinting contest Update: Added V2.2 with feet added Update: Added V2.3 with a redesigned rubber band holder on the inner piece, and also grooves to keep it centered If you liked this thing, and are feeling generous, Tip the author! http://tinyurl.com/l4wqge3 (This link will take you away from thingiverse and to paypal.)