never played w. him on UB but I know about the bet pot button, the speed and agressiveness of the games, and the player himself and as everyone else said am suprised you didn't give more action on flop/turn.

I saw you say:

because I have a good read that his turn play cannot be a draw. I had a hand with him where he potted a draw and did not fire when he missed (in fact I've never seen a missed draw bluff from him)

which is where I disagree just because you never saw him do something doesn't mean hes capable of it. I have played with so many of these types of fish and they are capable of anything anytime. It's really weird sometimes when they play extremely passive preflop OOP vs button raises, never reraising for hours and hours on end then suddenly when they make a re-raise you but them on KK/AA but then end up showing up with K3o..