[iggymcfly]

If he's as ABC as you say he is, you have zero worry about him folding unless the board pairs. I'd just go ahead and repot here. Top set will be glad to get it in against two flushes (which is what he'll put you on) and other sets are unlikely here. The only worry is that a board pair will kill your action, so just make sure that the nut flush pays you off.