Yeah, I've experimented a lot with tightening. It seems to help somewhat if they are that loose, but then your heel comes halfway out on toe-side turns, and riding is pretty much impossible.
For me, if I only keep the lower section loose, there is no significant difference in heel hold (the upper section is really tight). What makes a big difference in ankle hold/heel lift is the ankle strap angle. The strap mounting holes that are the furthest back/highest work by far the best for me.
Also, a binding with a capstrap is a lot more comfortable for my forefoot (in case, you don't have one).
Last edited by behi; 03-11-2013 at 07:50 AM.