I would bet size of the pot instead, to make him pay if he has a worse K, or fold if he has something else. I dont want him to hit a second pair on the river, or an ace if he has got an ace. It also works with a half pot bet, perhaps the only difference is that he is folding more to a pot sized than to a half sized pot. So, in the case he calls, and we have him beat, we are getting more chips from him if he has a lower K, and he is folding anyway if he doesnt. On the river Im playing strong if a rag comes again.
