Line check on this spot.

I didn't have the full 88 hand sample while I was playing this hand. I had him marked as a unknown tightish reg like player.
I check flop back, which im not doing all the time figuring I wasn't really worried about too many draws, and I could get two good streets of value, maybe three if I could raise him on safe rivers. This is bottom of range for 8x, so I would check back a very small % of the time. If I had the reads on him that I do now, yes it is mando value bet (big) all day.
The river is good because he makes some nut hands with QJs hands if he has any in 3-bet range A9 will call another bet, as well as his stronger Ax imo. 99 gets there but limited # of combos.. Slow played AA, A8, T8 and TT are the only hands im worried about and those are few and far in between.
We get raised on river, and I feel my hand isn't quite as strong as I did before. We catch bluffs and overplayed value hands. I see no real value getting it in, do you?