I find the propaint1 jump to be more about getting the right starting position than anything.
Where do you start? for me I stand right before the flag post and jump up to the bridge strafing left, then right, then end on left, I make it 98% of the time.
m7feettall: on the airtime one, if you want to go from middle to enemy base, when you go up the middle, make sure you hit the bunker to your right at the top and jump off of that.
Bitmate: I have a video of it, I just cant seem to do it.