[PLO 5] 450bb pot with naked straight on rainbow flop

I think you played it just fine, a bdfd redraw I dont really consider a redraw and it might add 3-4% in his favor or something. If you say he was really aggro with bottom set on a straight board before, I don't fully understand your question whether or not you made the right play here. I am going to presume you lost the hand and are having second thoughts. If you wait for the turn, if the board pairs and you fold you can fold to a King hi straight for all I know if he keeps on betting...if the turn is a non-pairing diamond, your equity actually goes down from the flop because now if he has the flushdraw he will be a 60-40 favorite. So if you fill in sets and lower straights and the same straight and the nutstraight with a set freeroll (which is like only a few single combos which do that) vs your hand, you will find that your stackoff here is legit.

Especially when you say he has been aggro with sets on straight boards, just get it in.