How to modify surefoot footbeds at home?

[Dr. Emmet Brown]

So I've had these footbeds for 5 years now, and overall my left foot has been 100% satisfied, but my right foot about 75%. There is a spot in the arch support that causes my arch to cramp and ball up. I can take my boot off and pinpoint the source of the problem. 2 years ago I had it shaved down a bit and it helped, but it definitely needs more.

Anyway, I don't live anywhere near a Surefoot store, or else I'd just go there. I'm just wondering if anyone knows the general procedure? Ideally, I'd do this stealthily so as not to void my warranty...

My guess is:
1-peel off blue surefoot label layer
2-sand down
3-re-adhere top layer--spray adhesive?

TYIA

[chewski]

how long does surefoot warranty their footbeds? 5 years? peeling off/spray adhesiving back would mean you are grinding on top of the footbed (the surface you are standing on)? my experience w/ having surefoot orthotics modified involved grinding from the side/bottom to get the footbed to sit flatter in the boot rather than grinding on the top. i would just use a dremel to shave down in the area you are pinpointing. do it in small increments and you cannot go too awry.

[L7]

Chewski has a good point. Not sure where your 'spot' is but typically the footbed being squeezed from the side pushing the support up and causing the problem. You can check by trying the bed in a wider shoe than your boot. No pain and it's likely how the bed is fitting in the boot instead of the orthotic itself. So shaving material off the side at the arch or on the lateral side (if it's too wide there) may do you. You could also shave down underneath the arch support to let it give a bit more. a dremel tool will work very nicely either way. Check carefully how the othotic seems to sit in the liner and maybe in the shell (no liner) as well and sort out where the push is happening.

BTW small amounts and then try the change. You can always take more off but it's really hard adding more on.

[Dr. Emmet Brown]

Surefoot footbeds are warrantied for life.

Guess I was kinda clueless--thought the grinding was done on the top side of the footbed, though it makes more sense for it to be done on the underside. However, the problem spot is a really small area, and while I'm certain I can pinpoint where it is on the topside, not certain I can pinpoint where to shave it down from the bottom.

I'm gonna proceed carefully with a dremel and post my results here.

[L7]

If it's a 'really' small spot and you can feel the bump on the footbed OR you can feel anomaly on your foot in that spot that needs a little pocket then you can work on the top. Otherwise I would start with making sure the bed fits the liner from the sides and THEN from underneath the arch to fit in without being pushed up by the shell or liner. If your foot hangs over the footbed that ridge can also be the problem but it doesn't sound like that's the case.

[Dr. Emmet Brown]

My foot does hang over the ridge in the footbed. Strangely, so does my left foot but it's never been a problem there.
I tried to recreate the pain, but it seems i need the pressure of skiing to bring it about. SO, until that happens I'm not gonna do anything.
Wish I had a Surefoot nearby...