If you aren't playing in competition and it's a knockabout/basement type laugh there's no issue of rules really. Just didn't want to see you invest time which could have been better spent on constructive training if you are playing competitions etc.pretty sure there's no rule restricting it.
I know the rules mention alot about the racket arm and free arm but honestly never seen it in a match situation.
It's really a qualified umpire question I think.