i usualy look at the part of the rail i want to land on when i am spining, then when you land look at the end of the rail and you will almost automaticaly do a 270 out.
are you drifting or osmhting (must be if your missing the rail) so if you spin left, start farther right on the box/rail, and oppisite if you spin right.
umm well i have done a few then the snow left me . soo back to the point , when you span try to spin fast then stop the span at the 270 adn then land on the rail . what iam saying is try to stop your spin before you land on the rail.
i wouldnt keep ur feet right together, just make sure u get a good pop, look where u wanna land, turn your whole body 180, then try to just turn 90 w ur hips, this stops u from spinnin of the rail
Best example: Ya, just watch the rail center between your feet after a 180 and then just spin the 90 wit your hips. You definately won't have to worry about missing the rail if u do this.
try just popping a 270 on the ground once you get that just take slow speed and try it on a box then once you get that down try it fast, its realll easy once you get it down