The metalbars layed in clross wtih cloth-lock is a very interesting priciple. I actually tried to use it on one of the builtin void lvl where the ball i comming from beneath, but never made the final tweak. There is potential in that principle to make cheap catchers in future contests I think.[/quote]
Yes, saves $. I thought I had the contest won with that idea. Looks like I have a lot to learn still.
p.s. I really liked n.fav's Montgolfier solution.