After just a few days doing the exercises in the video posted a few posts back, my son's pain is gone. He can't believe it went from intense pain to feeling normal in such a short time.
To be on the safe side, he's still off the ice for a couple of more days. So I went to work on verion 2.0 of the eyelet extenders. Going with Vet88's advice, this version uses belt leather (literally cut up an old belt to make these). And instead of using hardware, which was going to deform his eyelets, again to Vet88's instructions and I'm just tying them off with some skate laces. I cut up and used the thin wax laces that started us down this path in the first place.
I think these are going to work great. They raise the lace pressure point by a few mm at least - he won't get the pressure across his tendon with this setup. Find out this week when he tests out the setup.
colins