Ran some quick math to back my arguments up. As we see it's a clear call even if he never valuebets worse and only ever has nut flush draws, which are both kinda ridiculous assumptions. Given that he almost certainly bets QT and might even bet AJ sometimes it becomes a clear call. Another thing going for us is that we're probably not going to make many mistakes on the river because people triple barrel super rarely at the micros so we can pretty comfortably fold blanks without any further reads.
Board: J
4
9
Q
Equity Win Tie
CO 60.58% 56.64% 3.94% { JJ+, 99, 44, AQs+, ATs, KQs, KTs, QJs, T8s, Ad8d, Ad7d, Ad6d, Ad5d, Ad4d, Ad3d, Ad2d, AQo+, ATo, KQo, KTo, QJo }
SB 39.42% 35.48% 3.94% { KcQs }