i didn't even needed to take the plate off, i personally just put the bolt below, and behind the headtube, and it would push against the front plate, it doesn't move for me at all.
im running it right now i just used 3/6 on top and 5/16 on the otheres make sure the 3/8 is tight idk y but that was the broblem for me and if that dont fork try cutting the plate off