3bet, flop quads, now how do I extract the max?

[holdem2000]

Villain is 23/18 over about 150 hands, but his attempt to steal % is about 44, hence the 3-bet. Some would probably suggest that I 3-bet a little more but I always 3-bet for 3x the initial raise in this situation regardless of my hand. So far the villain has folded to all CBs in hands I've seen, but that's probably a nearly meaningless sample size.


PokerStars No-Limit Hold'em, $2 BB (5 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: 2+2 Forums)

saw flop

Button ($197)
Hero ($201)
BB ($196.05)
UTG ($74.80)
MP ($218.55)

Preflop: Hero is SB with 4[img]/images/graemlins/diamond.gif[/img], 4[img]/images/graemlins/club.gif[/img].
<font color="#666666">1 fold</font>, <font color="#CC3333">MP raises to $8</font>, <font color="#666666">1 fold</font>, <font color="#CC3333">Hero raises to $24</font>, <font color="#666666">1 fold</font>, MP calls $16.

Flop: ($50) 3[img]/images/graemlins/spade.gif[/img], 4[img]/images/graemlins/heart.gif[/img], 4[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(2 players)</font>
Hero checks, <font color="#CC3333">MP bets $40</font>, Hero calls $40.

Turn: ($130) 8[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(2 players)</font>
Hero checks, MP checks.

River: ($130) 9[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">Hero bets $137 (All-In)</font>, MP folds.

My usual line is just CB 36 on the flop here, I probably CB about 2/3 of the time and check 1/3 of the time... then again it comes up so infrequently I might be fooling myself about that.

Considered CRAI on the flop for a while but decided he only calls that with a couple over overpairs, and those he'd likely bet again on the turn anyway.

I'm now thinking it's probably better to just bet about 60 on the river, thoughts?