Just wanted to add to this thread - last weekend I had a great session but I discovered the major reason for the problems of me getting into the back foot strap was that it was twisted!
The sides of the straps twisted to the inside so both back footstraps looked like this: \ / insted of this: / \ and it was harder to slide the foot inside.
I checked and the screws hold pretty good, I'm afraid to overdo them. I had to apply quite a lot of force to align the straps again (without touching the screws), but they twisted again after a couple of hours.
Any solution to that?