My home mountain.. I haven't done that one yet, where are you sliding off? If you look really close, it appears the last few feet are actually bent, which is why I didn't bother trying it.
I just got the down rail down last time, I'll prolly be there tonight (sunday) and most likely will be trying that if there's enough snow to hold the rail in.
Definetly get speed, unlike the downrail were you can literally stop and just step on, since its 1 barrel speed will definetly help. When I was learning shotgun rails speed was the difference between finishing the full rail, and me barely being able to just stand on the rail for more then 5 seconds.