Oh, and in case you can't tell, the rail's about 10 feet long.
Pvc pipes. Plywood supports. no 2x4's so it's really light.
It seems to work well (it doesn't fall apart), but it's not quite perfect for 270's. Either i'm just absolute crap at trying (i've never done one before), or i don't have enough speed for ons or offs.
But i'm happy with learning. I'm getting comfy with rails, that's the point of it for me.