He attempted it at his last JGP; it was DG in the SP and UR in the FS. And Jason did land it in the SP.
The 3A is not an easy jump and sometimes you have to break it down for a while before it clicks. We saw that with Ross Miner with his 3A a few seasons ago. Jason himself said he finally felt at ease (i.e. no UR/two-foots/DG) with the jump last Wednesday, so I'm not surprised that he wasn't absolutely perfect in the attempts.
I think Jason and his team know what they have to do next. I expect improvement at Nationals and JW.
Thanks Mrs. P...I was just coming hear to mention the short. It's good to know he's done it so I'm happy for him.