[bluesbassman]

Besides your play on the turn as others have mentioned, I also really don't like checking the flop. You have 2-pair in a multi-way pot on a draw heavy flop. I like a strong lead in this spot, because you may not even get the chance to check-raise in an open-limped pot, and it's a disaster to give a free card here. I don't mind taking down the pot on the flop given that board.

If the LAG chip leader raises your lead bet, you can shove with the best hand. If he just calls, he is (probably) not getting proper pot odds to draw, and meanwhile you are keeping the pot smaller than if you had check-raised. Then you can more easily re-evaluate on the turn and get away from the hand if the draw hits.