Ok I also read that as well but would reaming out the frame would that mean I won’t be able to use the Mc21 swing arm if I even decide to go back?

An other option I have is that there is someone kinda close to me selling a Mc28 frame since I got a hold of the swing arm would I be better off buying the frame and switching everything over from my Mc21 over to the the Mc28 frame so I could use the pro arm?

This way I have 2 different frames to switch back and forth from but also wouldn’t want to spend the extra cash if I don’t have to you know guys