Not the easiest to reattach a top plate once things are magnetized. You need to be careful and make a nice long gage to slide things back into place while the glue dries. (pinching fingers between a top plate and a stack of charged magnets is less than fun) You wont have much of a choice recentering the "top assembly" either as you are relying on the 6 mounting screws to the top plate and not the soft parts around the pole piece. But, considering the gaps are normally a little on the larger side it should be good.