I've had ACL reconstruction (patellar tendon autograft), started flying RW in tunnel 2.5 months post opp, and then FF after a couple of weeks. But I wear a brace _under_ my suit. Also, I started jumping about 3 months post opp, though with a low wing loading (about 1:1). Now it seems to me it would be better to wait at least 4 months, but everything went ok. However, you shouldn't take this as an advice, just my personal experience:)