looking for a line w/ marginal overpair 100NL

[joseki]

SB is 15/8/3.7 over 1250 datamined hands.
BB is 83/11/2.1 and the reason I'm at the table
The rest of the seats are taken by tight semi-aggressive types.

Full Tilt Poker
$0.50/$1 No Limit Hold'em Ring Game
6 Players
LegoPoker Hand Converter

<font color="black">Stack Sizes</font>
UTG: $100
MP: $135.75
Hero (CO): $399.05
BTN: $129.90
SB: $88.85
BB: $109.15

<font color="black">Preflop:</font> 9[img]/images/graemlins/spade.gif[/img] 9[img]/images/graemlins/heart.gif[/img] ($1.5, 6 players)
<font color="red">UTG raises to $3.50</font>, MP folds, Hero calls $3.50, BTN calls $3.50, SB calls $3, BB calls $2.50

<font color="black">Flop:</font> 7[img]/images/graemlins/spade.gif[/img] 3[img]/images/graemlins/diamond.gif[/img] 7[img]/images/graemlins/diamond.gif[/img] ($17.5, 5 players)
SB checks, BB checks, UTG checks, <font color="red">Hero bets $12</font>, BTN folds, SB calls $12, BB folds, UTG folds

<font color="black">Turn:</font> 7[img]/images/graemlins/spade.gif[/img] 3[img]/images/graemlins/diamond.gif[/img] 7[img]/images/graemlins/diamond.gif[/img] [4[img]/images/graemlins/club.gif[/img]] ($41.5, 2 players)
SB checks, Hero checks

<font color="black">River:</font> 7[img]/images/graemlins/spade.gif[/img] 3[img]/images/graemlins/diamond.gif[/img] 7[img]/images/graemlins/diamond.gif[/img] 4[img]/images/graemlins/club.gif[/img] [T[img]/images/graemlins/diamond.gif[/img]] ($41.5, 2 players)
<font color="red">SB bets $20</font>, Hero folds
Uncalled bet of $20 returned to SB

[Sciolist]

I think I'd probably raise the turn too. Whilst I quite like checking behind on boards with a draw, there's also a straight draw, and he could easily have an overcard with a diamond draw too, which we obviously don't want him to hit.

[D.L.M.]

you gotta bet that turn boyee. just half, If he c/r es you i doubt hes drawing, becuase he thinks hes got his implieds to just call half the pot.
and of course you should check the river and evaluate a donk on his part which will almost never happen.

[BombayBadboy]

Its been said -- bet the turn, fold to a raise. Charge draws and lower pps and get value for your hand.