[Nl100] flopped the nuts. Betsize on the turn?

[2weak]

Poker Room skin
No Limit Holdem Ring game
Blinds: $0.50/$1
5 players
Converter

Pre-flop: (5 players) Hero is BB with T[img]/images/graemlins/spade.gif[/img] J[img]/images/graemlins/spade.gif[/img]
UTG calls, CO calls, Button folds, SB calls, Hero checks.

Flop: 8[img]/images/graemlins/spade.gif[/img] 9[img]/images/graemlins/spade.gif[/img] Q[img]/images/graemlins/club.gif[/img] ($4, 4 players)
SB checks, Hero checks, <font color="#cc0000">UTG bets $1</font>, CO calls, <font color="#cc0000">SB raises to $5</font>, <font color="#cc0000">Hero raises to $15</font>, 2 folds, SB calls.

Turn: 4[img]/images/graemlins/diamond.gif[/img] ($36, 2 players)
SB checks, <font color="#cc0000">Hero bets $30</font>, SB folds.
Uncalled bets: $30 returned to Hero.

Results:
Final pot: $36

villain is a callingstation.
Should i bet less on the turn to let him draw knowing that he is either drawing dead (67 or lower flushdraw) or drawing slim (he has 4 outs less for his fd)?