Villain is 26/22, and seems to be a 3BB winner over a decent sample according to PTR. Notes on him as follows:
Calls 3bet OOP with KQo, c/r KQx board
Flats 3bet from BB in MP with QQ, raise/calls shove on 258tt

CO in this hand is a mega fish, like 60/25 or something, flop bet is standard as MP is c/f a lot of the time with two players behind and my equity sucks vs overcards, CO can obv call with worse also.

After villain calls the flop I put him on 7x, 88-TT and AQ/AK. I think he cbets fds, Jx and QQ+ 100% of the time with the fish in the pot.

On the turn I think I credably rep a fair amount of 7x and Jx hands, with the fish in the pot I flat A7s, 78s, 67s, 75s etc etc. My betsizing looks like a want to get stacks in the middle by the river.

On the river Im not sure his range changes much from the turn, possibly peeling one more card before deciding what to do with his weak holdings. I dont expect villain to ever fold 7x here.

Full Tilt Poker $0.25/$0.50 No Limit Hold'em - 6 players
The Official 2+2 Hand Converter Powered By DeucesCracked.com

CO: $70.75
Hero (BTN): $62.30
SB: $85.10
BB: $95.85
UTG: $50.00
MP: $52.50

Pre Flop: ($0.75) Hero is BTN with 6 6
1 fold, MP raises to $1.75, CO calls $1.75, Hero calls $1.75, 2 folds

Flop: ($6.00) J 7 J (3 players)
MP checks, CO checks, Hero bets $4, MP calls $4, CO folds

Turn: ($14.00) 7 (2 players)
MP checks, Hero requests TIME, Hero bets $11, MP calls $11

River: ($36.00) 5 (2 players)
MP checks, Hero bets $45.55 all in

spew imo, the river overbet is unncessary (you can just bet like 28 and save yourself 17 in case this misses) and even if he won't call with lots of hands like QQ, his turn call is stronger than you think and he may as well have the jack and its probably best to c/f turn or c/f river

River isnt an overbet, villain has less than a PSB left.