It has been suggested to me that the RC'ers here on Openbuilds might be interested in my Brushed/Brushless Motor Foam Cutter. The method is "novel/unique" but not new... I've been using it for several years now to cut all kinds of planes and figures out of various sheet foams (bluecor, DTF, etc). I actually introduced this back on the Phlatforum (http://www.phlatforum.com/xenforo/threads/perforator-style-foam-cutting-head.2836/) in the summer of 2012 as a possible attachment for...
Brushless Motor Foam Cutter and cutting sheet foam
Brushless Motor Foam Cutter and cutting sheet foam