to everyone above me: you're wrong. PX12s and FKS 140s do not use the same hole pattern on the heel. the toe is the same, so you could reuse the toe holes, but i'd heli-coil them to be safe, since you don't know whether the old bindings were unscrewed, ripped out, etc. the FKS uses a much shorter mounting patter on the heel than the PX series bindings do, so before you mount the toe, make sure you're not going to run into any hole conflicts with the heel. or, be smart about it, and take them to a shop, where they're trained to do things like mount bindings.