[curtains]

I check behind on the flop. I like this play a lot when you flop the nut flush draw, even headsup as the preflop raiser.

Basically avoids all the difficult decisions you are faced with when you are checkraised. There is nothing worse here than getting check raised off the nut flush draw, and if you decide to call anyway, okay it's not the end of the world to get allin on the flop, but if your opponent has a great hand worth putting all his chips in, it'd be nice to see a free turn as you might win all his chips anyway.

Also the pot is small enough where it's not very important for you to win it right away.

When I play this is a pretty standard check behind in this situation. This isn't to say I do it 100% of the time, but it's definitely the default play. Just think about how much easier the hand is to play...