just keep upright and when u spin do it level and not tilted to one shouldweit also helps if 360 through u spot for your landing more speed would be nice as well
dude, your jump is plenty big, i think that when you spin your head is leading but your looking down, like left and down. try keep your head looking parallel to the ground instead of looking down...and when you spot at 360, dont stop your head, keep it going and look back up at the jump