That's pretty slick. Cheap and easy. I just acquired a whole room of old target that I would cut and roll up to make something about 3' or 4' in diameter. Problem is it was from my daughter's house and 3 cats had been pissing on it for who knows how long. I think I'll pass on it for now. LOL. It's nice living within 6.5 miles of two archery clubs. I shoot their bags. Still, yours is a good idea for those not as fortunately as me.
If You're Not Living on the Edge You're Taking Up Too Much Space
Martin/Rytera Staff Shooter
PSAA Life member, UBP Life member
PADI AOW Diver