oh so one of the exercises I did (this is for slyder) do a FS 180 then when you land do an immediate BS 180 once you land do a FS 360, then BS 360, keep adding a 180 rotation once you complete a set. so 180, 180, 360, 360, 540, 540. If you mess up start back at the 180. It worked really well for me.
I don't know if I'll go as far as the 5's. On the snow I will be happy with 3's and that is just fine for this ole dad
This is a great tip I will let ya know when I hit the tramp park. My kids go often and I need to drive them so I will be buying some time. Work on the tramp and they also have a nice indoor rock wall. I'll hit them both.