yeah, I can't mount without the back because it's what holds the rear part of the binding down, the back two screws. Anyways I think it would work because the angle would be so small, I still just think it could be a safety problem, but obviously am still unsure. Well by now they're probably already mounted, but I'll for sure try it when it comes time to get a new pair. (4 years later)
Someone please kiss my '07 fujatives that I paid $90 for new!