BTN is a huge fish (90/50) and CO is a 40/24 regular who has AF of 2.1 and doesn't stab, raise, or c/r too often on the flop. He does a bit more of that on the turn. W$WSF is 40%, WTSD 29%. On the flop I didn't feel comfortable c/c because my hand is so medium. I'd rather just c-bet and ideally take it down or get HU with the fish - although with SPR ~8 I can imagine quite some turns will make things awkward.

Of course only CO calls, and I'm really not sure what to do. I still have equity and blockers to the nuts so I didn't want to c/f. However, c/c doesn't seem particularly appealing either, nor does betting. I can see CO flat a variety of top two/sets otf, especially to try and keep the fish in, with the intention of jamming on a safe turn. So how to proceed? Is c/f best after all? Or is SPR so low that I can simply pot/commit and hope to take it down some of the time as well? And how about the flop c-bet? Thanks in advance.