I'm looking to build one to add variety. I'm gonna go with a down rail of some kind, I've got most kinds of lumber available. I tried a 2x4, griding the edge of it, and it caught like a mother because you couldnt get your skis flat on such a small surface. I was thinkin go with the larger side of a a 2x4, but I'm very open to suggestions, I'm not 100% sure how to do this right. Anybody made one that worked really well?