Prima 10+1r&a/ bsb hand

[Rickyroodido]

Early after the rebuy period. No reads.

Hero has K4s
Button: 10K
Hero: 4K
BB: 4K

Blinds are 100/200

Preflop:
Button calls, Hero completes, BB checks

Flop: (pot 600)
K [img]/images/graemlins/heart.gif[/img] 8 [img]/images/graemlins/heart.gif[/img] 4 [img]/images/graemlins/spade.gif[/img]
Hero bets 400, BB folds, button calls

Turn: (1400)
8 [img]/images/graemlins/club.gif[/img]
Hero bets 800, button calls

River: (3000)
2 [img]/images/graemlins/diamond.gif[/img]
Hero checks, button bets 1400, Hero calls

How is my line?