Hi Chris,
Thank you for your reply,and I really learned from your reply.
Just like what you said" It's also easy to get it wrong if you try and self diagnose and fix things yourself."
I bought my ski boots with the custom ski footbed form an experienced ski boot fitter(being a boot fitter for over 10 or 20 years and kind of well-known in that area)
After I put on them,my feet hurt during skiing ,then I got torus formation.
Besides,it is too loose,too.Then I tried to fix it myself.I had no choice at that time.
Recently my ski instructor told me that something is wrong with my custom ski footbed.
Actually it is a really sufferring experience.
But I learned something from this suffering experience.
It seems it is an impossible mission to find a professional boot fitter who knows alignment assessment,and provide well-fitted ski boots,etc....not an experienced one.