That ball delivery system looks familiar to ours! I can't tell if you guys used a dog bowl though... It looks like you may have made the "bowl". :-)
https://www.facebook.com/photo.php?v...type=2&theater
Nice looking machine, but that seems like a lot of work just to go over the "bump" smoothly.
I'm curious as to why you chose this method?
Do you plan on sitting on top of the "bump" to shoot or perhaps to obstruct passage over it?