[Andy B]

Fourth street is well worth raising. Either the guy behind you is calling or he isn't. If he's on spades, he'll call two bets, and if he's on a low draw, he shouldn't even call the one bet.

I would bet out on fifth, but I'm not convinced that chicken-calling is terrible. I would also bet sixth, but I'll make the same observation as fifth.

I would bet the river as you did, but when seat 2 raises, it looks like he's probably made a better low than yours, especially if he has a clue. You've been representing a low draw the whole way, and your bet makes it look like you finally got there. I don't think he's raising with an Eight. You call, of course, but I wouldn't re-raise.