Currently skiing hawx ultra 120s with expert booster straps but I've been collapsing the shells when I'm charging through chop. Would getting the World Cup booster help with this at all? Only other think I could think of is a stiffer liner but I don't really wanna do that as the fit is pretty dialed.
That's a pretty soft boot. If you already have two bolts in it and a booster strap I don't think upgrading the booster strap will do much. Try sewing the two inner booster straps together like the world cup one. I wouldn't bother buying new straps. Are you using the booster straps under the cuff or over the cuff?