Longshot...but has anyone dealt with knee brace and snowmobiling?

My knee injury happened a few years back at the end of the summer. (Just before labor day) I rode that winter but was pretty cautious with it. I skipped the first few early days when there wasn't lots of accumulation and conditions weren't great. It was tough but I knew I'd regret it. Once I couldn't resist any more I wore my brace under my snow pants. From there I was mindful of what I was doing on the sled and I avoided walking through the snow and avoided getting involved in digging others out and doing more than I needed to when I was out. My buddies understood and I would try to make it right by supplying cold beers back at the truck as a way to say "thanks"... That being said, my knee has never been the same but I don't think the sledding was a contributing factor.