I know the heel pieces on these bindings can be moved, like most, but I want to be sure before I start messing with them. The screw I circled in the photo is one of 2 identically placed screws on the sides of the bindings. It appears that if I slightly unscrew both of those it will allow the binding heel piece to move but I would like to be sure before I do anything. Can anyone tell me if I'm right or wrong? Thanks for taking the time to look!