They come out with the PCSM average every year for those selected and if my memory serves me, the number is running around high 60s - low 70s. However, dont take my word on this. My son had a 95 also on his pilot score and wound up with a PCSM of 70 (no hours). So based on that, your 48 isnt looking that great. With the 20+ hours, that 65 isnt looking too bad but it could still be better. With my son's 201 hours, he wound up with a PCSM of 98. So you have two choices, redo the TBAS, but realize that they take the highest score so if you do worse, you will wind up with a smaller score. Or you can add more flight hours. Also while not a requirement, a good percentage of those who get a pilot spot also have a pilot license. Of course that could just mean that those with high PCSM scores have high flight hours and anyone with hours over 70 is probably going to have a Pilot license. Just to give you a perspective, if you were to try to join a National Guard unit that flew fighters, they wouldnt look at you unless you have a PCSM of 90 and a pilot license. Now that is different from trying to get an active duty pilot spot but it gives you an idea how the PCSM is looked at.
ENJJPT PCSM average is way higher. Somewhere from 80 - mid 90s. I would have liked for my son to have gone to ENJJPT but that didnt happen. Not sure if it matters anyway. Probably way more competitive and while they seem to graduate more fighter/bombers than regular UPT, there is no guarantee you will. Plus everyone goes from T-6 to the T-38 and not everyone can handle the T-38 well. With UPT, you wind up with plane that works better for you. For example, its better to be a top pilot in a T-1 at UPT than a below average pilot in a T-38 at ENJPTT. Someone from ENJPPT transferred to my son UPT class because he couldnt handle the T-38 and he is doing great as a T-1 pilot