Personally I don't know why every hates demos so much...I had P12 demos on my Mike Nick 178s and they functioned just as well as all the other pivots I've owned, they add a miniscule amount of weight (because it isn't much, and it's directly underfoot, not swing weight) because of the extra track, but they are still a solid pivot binding, I'd say go for it, especially at that price. If I didn't already have way too many sets of clamps I'd be tempted.