i think a 4-5x preflop raise is a little bit more in order. I'd bet half the pot on the flop. If he just calls it, he's probably scared. If he reraises, unless you know him to be like that to try to steal, fold. but, if he calls (as he would've done in this case), go ahead and rip out a 3/4 pot bet on the turn as long as its not a scare card. 1/2 the pot on the flop is not too big, 3/4 the pot on the turn is much bigger. he's not tied to the pot, i bet he would've let it go right there.

I did basically this to a calling station earlier, a few times. in a .20/.40 room, he would basically call any 1.60 bet. so i was in late position, unraised to me i bet 1.60. he and one other call, flop came whatever, i bet 2.40, he calls other folds, by now pot is like 8 bucks and worth having, turn comes whatever, i bet 6 he folds.