well now theres only 3 jumps they changed em a little bit. theyre definitely alot more sketchy now, lots of people were getting hurt.
and also the public pipe is up. like a 10 foot flat bottom though
for speed you can use plastic lattice, and then astroturf on the jump because the lattice has no grip and u will slip out.
and for attaching the pvc you should drill up into the wood from below into the pvc.