EP and CO are regs, BTN is whale 67/32 stats.
Seen him float random on 337 then donk K turn and 2 rvr for 1/2pot with air. So his 1/2p sizings maybe weak, maybe his pots are strong but i don't have a sollid read on that.

In this spot i decided to check flop as i do with allot of my range because these mono boards are really hot/cold i have allot of hands that have very low equity.

Now since CO checks i am not so worried about him, i think he would bet JJ,99 and flushes in fear of it getting checked trough. Tho cannot totally discount it. Now i feel i am in a really tough spot, maybe its still best to fire flop small and go from there ?

Im not sure how well i do vs BTN's range to start with.
He's got a ton of flushes in his range, all the sets, J9, but also Jx, Draws, QT, Adxx. All in all i think i am around 40% only maybe less, so its not ever that great. Should this just be a check/fold with CO involved as well ?

Lmk what you think, thx!