This is a wonderful item, and has probably inspired more ideas in me over the last week than a lot
of apparatus has inspired ever. As an FYI, I use this in conjunction with the slippery shell with
great success. (Why 4 stars and not 5? Because it "talks". This shouldn't be a problem and I can't
imagine a way to construct it so that this problem is solved, but nonetheless, I have to be honest
in my rating and it ain't perfect)