Flopped flush - 4th flush comes on turn...what to do?

[Uitje]

I actually like the check.
It gives your oponent a chance to bluff at the pot on the river with a hand worse than yours, while keeping the pot small when you are beat.
I think a full house is unlikely since that will play the flop way faster.
The only downside of checking IMO is losing value from a T-high flush.
I dont like defining my hand when I could see the showdown for the same price.