I had an ACL recon about 10-yr ago. My knee has never been the same...not sure if I had a botched repair. Seems the scaring and time to rehab after may out weigh the benefit...perhaps the surgery is better nowadays. I've had many braces for windsurfing. Started with a custom-fit townsend? I think that was the brand. After a few years my leg changed in shape so much I had to get a new brace...a custom fit Generation II. Recently I've worn-up my GII...purchased off the shelf CTI from ebay. Sailed with it for the first time last week. Seems like a good fit and didn't slide around much. With my other braces I had a cut-off wetsuit leg that I used to use to keep the brace in place.