Hey. Would like to hear your toughts about the Turn.

http://www.handconverter.com/hands/2677875

67/40 // call 3Bet 100% // fold to cbet in 3BP 8/9 // 0,9 AGF overall. 320 Hands.

General assumptions about Villain.
Villain is a fish who likes to see a lot of Flops and i think he is fit or folding a lot OTF. I have 3 bettet him a lot, cause he is that kind of fish who pays off your 3Bet and then folds vs a 1/2 PS cbet a lot. 100% call 3Bet so far (9/9 times), folding to 8/9 cbets after calling a 3Bet. The one time he called my flopcbet i had nothing, we x turn and i foldet OTR when he bets. So no info about his showdown tendencies.

PRE:
continuing my strategie vs this guy to 3Bet him rly wide and hopefully take the pot down OTF. But an unknown who was one tabeling in the BB overcalls. He plays one tabel so i guess he is a fish. If not, he is at least a weak reg, which i dont assume.

Flop:
we have a gutshot+backdoor diamonds//straights and the board is semidry. Given my general assumptions this is a easy cbet vs the initial raiser. I give the initial raiser every single hand and the BB can have any pair, ATs+, suited broadways i think. My hand has nutpotential so i def. cbet, even vs two weaker players to build a pot if we hit or to take it down directly. (even its the donkey end of the straight, blocking T8)

Turn:
we hit the five best card in the deck for our hand OTT (only 4 sixes are better). We are double guttet right now and have a decent flushdraw.

So, how would you guys play OTT?