I have only 2 hands with btn and 17 with mp (41/12 0.4 af)

I'll get it out of the way now - I hate my flop lead. Obviously its + ev in the sense that I am beaten only by KKxx but I prefer c/c on a board so dry. On the turn I like my bet because its pretty easy to see someone calling with Akxx. Sure I can be beaten by K8, K6 and KK and drawing to 0-1 outs but there should be so many more times that they have trips that it would be missing value to check imo. On the river the straight comes in and I bet again and I really don't know if this is ok. Looks like someone would have to be full to call here and I lose to more fulls than I beat. Check folding might be the play I guess but this just feels dirty without reads.

check flop, c/r turn

I agree with check flop but I think players at these stakes will very often check back a king with random kickers (which they will also call flop with) so I prefer the lead OTT

You don't have a K and its a 3 way pot, likely someone has a K here and will bet the turn, if they don't have a K you wont be getting paid anyway as they will just fold. So once you c/r ott - anyone with a K is not folding obviously given the flop action which is either checked around or check called.

I still say that someone with a K will check back as often as bet here