Good spot to double barrel?

[cheer]

no. this is fine.

[gball]

In my experience if you make a reasonable bet on the river you'll get a call from any K, any Q, and sometimes from any pair. That's why if you check the turn you have already given up and need to check the river too. That's why this line (bet flop, check turn, bet river) is effective when you have top pair hand that doesn't expect to get all three streets of value. Overbetting the river is another option to get more folds, depends much on if you expect the villain bet his K's on river or not.