I've used these before. They make more of a better target back for errant shots than actual target in my opinion. Of course, field tips will make it last longer, but broadheads will chew through that in no time. I used Tough As Nails to glue them together instead of the boards and ratchet straps you used. A water based paint might work on those Ed; like the kind they use to mark hash marks on grass for ballgames or to mark underground utilities. It is pretty easy to find at hardware stores. Plus it would come off your arrows easier maybe. You did a good job on your video! Real informative.