Like the title suggests, how long do you try to break a boot in before you just move on? I've got a set of Beartooth II's that I got this spring. I've got about 40-50 miles of mixed flat ground and hill climbs in. They still dig in across the top of my toes and my left heel still slips and causes blisters if I don't put some sort of protection in there. I've tried different lacing techniques, socks, liners, etc.....Just not sure how much longer I'm willing to dedicate to them unless I'm just not there yet.