heads up hand against unknown

[Scipio]

Villain is unknown and all other players went to sit out, so we played our first heads up hand. FPS or is my line logical?

Please comment every street. :

Titan No-Limit Hold'em, $3.00/$6.00BB (Titan HH Converter by Kreatief)

SB ($1,262.36)
BB ($667.45) (Hero)

Preflop: Hero is BB with 7[img]/images/graemlins/diamond.gif[/img], T[img]/images/graemlins/spade.gif[/img]
<font color="#CC3333">Hero raises to 15.0</font>, SB calls $12.00,

Flop: 4[img]/images/graemlins/spade.gif[/img], 3[img]/images/graemlins/heart.gif[/img], Q[img]/images/graemlins/diamond.gif[/img] ( $36 )
<font color="#CC3333">SB bets $24.00</font>, <font color="#CC3333">Hero raises to 75.0</font>, SB calls $51.00,

I gave him a marginal madehand that he often folds to my raise. Sometimes he has a draw/set and 3-bets me.

Turn: A[img]/images/graemlins/heart.gif[/img] ( $186 )
SB checks, <font color="#CC3333">Hero bets $130.00</font>, SB calls $130.00,

Now i thought he has a weak top pair like Q6s and saw enough FE.

River: T[img]/images/graemlins/diamond.gif[/img] ( $446 )
SB checks, <font color="#CC3333">Hero bets $444.45</font>, SB calls $444.45,

After he calls the turn i gave him a range like from QJ to two pair with Q5. wrong betsize?