Did a search in here and couldn't quite find an answer -- I'm using a net (will also be adding foam padding) to try and reduce bounce-back. I know the screen should be streched just enough to get rid of wrinkles. How taut should the net be? Also - if the net is a bit large, any suggestions on how to reduce slack? The easy thing to do is obviously roll it on the bottom (or top) and bungie it all down, but I worry if friction/rubbing from a bungie (or ziptie) will cause the net to fray?