Missed flushdraw

[Lethe]

Villain is loose and sometimes aggro (although hasn't been out of line). He tends to go too far with his draws though.

3 limpers to me, I limp As4s in the HJ, SB calls, BB checks.

Flop: Ks Ts 3d
Checked to me, I bet, 2 callers.

Turn: 5h
Checked to me, I bet, 1 fold, Villain thinks for a minute, like he is counting his outs or something, and then calls.

River: Kd
He checks, Hero ??

Is this a good spot to fire another barrel? I figure villain is either on a draw of some kind here, or has a T. Or do you think I should have just checked through the turn and c/f the river UI? My image is pretty rocky, although I doubt villain is giving that much thought.