Probably won't hang with a .46, might with a .52. .60 might be a bit much unless you built it and modified or made some things stronger. You will probably rip the wings off with a .60 eventually.

Might not hover anyway. Not really designed for it. I don't know what it will do when you stop the wing from flying. The propwash won't be over the ailerons as much like on a mid wing bird. Think you will loose effectiveness fairly early.