I am planning to try to do some home stretching on a pair of Dynafit ZZero 4 U MF boots:
Why do this myself? Well I've been to two good bootfitters, who have declined to try to modify the boot in the way I would need, which would involve stretching it in at ankle height on the inside about 3/5ths of the way back and around sole height on the outside at about 2/3rds of the way back. The boot fitters I've talked to say that it's hard to punch out a boot in that area and basically seem not to want to risk destroying it. I've had them about a year, and I don't think I could take them back. I could try to sell them used, but I thought I would rather try to see if I could make them work rather then get rid of them and start looking again. The short version of what is wrong is that with a heel lift & a non-custom footbed I've been able to ski them all day without pain, but then when I take them off my feet start to hurt, to the point where for the rest of the evening I can't put any weight on the foot. I can feel that what's happening is that the part of my foot around the instep and a little back is being compressed (I have wide feet and the widthe goes all the way back to the instep area, plus wide ankle and a prominent muscular area below the inner ankle).
I have some ideas about how I can stretch them and I though I would try - I'll supply a "trip report" if it works out :)
So my question is how and how hot to heat them. I've heated boots shells over a pot of steam in the method recommended on the zipfit site. I'm at sea level, so this will be fully 212° but I feel like I might need to get them a little hotter for the stretching I need. Can I do this in the oven (with a thermometer of course)? Any other comments or recommendations? I'll throw in a foot picture just in case it helps: