PLO25, 4-handed, 160bb eff
CO opens Q♦:7♦:A♥:8♠:
BU & BB call
I think it's a break even open from CO 4-handed. Now that I think about it, being 4-handed does not have any impact on it.
Flop K♦:A♦:7♠:
BB checks, CO checks, BU bets 75%, BB folds, CO raises 100%, BU calls
I think it's straight forward x/r. To good to x-call, I don't like betting because I will have to check on almost all turns even flush completing turns. I think with the x-r line I get more value instead of bet flop, check turn line.
Turn T♣: Checks through
River 2♥:
CO?
To bet or not to bet, 66% size. One one hand I have some SDV on the other hand I have AA advantage, I block the straight, he's heavily discounted in both. I do block the missed fd which sucks. I don't think I am going to win at SD a lot, so betting makes sense, I think I make fold out better 2PR maybe even set of KK. I might also get value from worse 2PR like K7j,KTJ, KJ+fd.
What do you think?

