[media]http://www.youtube.com/watch?v=wQtov_eHKyA[/media]
Hmm. If it's the ballflight feedback you're after, then this needs some further investigation. The video shows feedback on pull hooks and push slices. It's not clear to me that this won't misdiagnose push-draws and pull-fades. Could be great, but I'd want more information if I was looking for more than just a bog-standard practice net.