well after adding other vehicles to it: hummer, M-109, stryker, harrier,
none of which where very successful, either too large or very hard to keep it on the ramp. The ramp itself has no collision mesh so vehicles tend to fall though it, just like how if you jump on it your legs are half way though it.
For this i had to change the mass alot, and tweak the position where it spawns, but as soon as ur on the throttle, there it is off the back. That seems to be the problem with vehicles especially those with wheels or tracks
But this is my attempt at the sa3
Added the sa3 to the ramp
But doing this also added a PCO to it, so you could enter this by pressing 4
But then once that guided missile blows up, thats it all over, it switches you back to Postion 1
unfortunatly this doesnt works SS, i assume because it adds a PCO, but ill keep trying to add it.