Speaking of the contraband
I'm fully aware of how to adjust K2's. I've never been able to get the toe strap adjusted right so you're boot is positioned right. This was the same problem with Ride's Contraband.
I didn't have a problem with the contraband. I like the strap so much I put it on my cinch chassis. I've been riding it for a couple of years now. If my experiment blows up just have to put the old straps on which take less than a minute.
I can understand people having problem with the contraband, there are too many variations on external dimension of boots. It would cause a problem especially if your boot size is the border between binding size. Some boots are taller than others.