Well, first of all, that is a really cool and creative setup, and secondly I don't believe this would give you any unfair advantage in games, so I think it would probably be okay. However, Vanguard does occasionally have some false positives so if that happens, report it to Riot and tell them exactly what happened, but since you have already played one round of competitive and didn't get banned outright, I think you're in the clear.
