Punchers Chance turned out to be a pretty novel approach. Its one of my favorite designs that I've come up with myself (most of my newer designs are tweaked knockoffs in search of solutions with less pieces).
A version of it currently holds the record for fewest pieces to solve, though this original version works a lot faster with the extra piece left in.
Punchers Chance:
http://fantasticcontraption.com/?designId=5320