HI smart garden people! I built a temporary hoophouse over my tomatoes and peppers (our last frost date is supposed to be April 15th, but we've had two since then) and I'm having trouble finding something to hold the plastic on. I looked at the Territorial catalog and decided that $10 worth of plants probably wasn't worth $20 of specially made clips. I figure someone else who is as tight as me has come up with something great, so what is it?? Thanks very much!