It is a Must-Have
I had to install these twice, and here is why: My aluminum channel is from a different supplier and does not seem to offer enough of a -pinch- to keep the strap in tight. I installed the straps tight with about 6 in. left on each end, and they slid out from behind the spring wire after a few minutes. The fix was a matter of doubling the straps over the spring wire and installing an additional length of spring wire on top of that (as suggested by Tunnel Vision Hoops experts). I also used a TEK screw on one that was not cooperating with me. I made sure to leave an extra foot or so on each end. I may end up trimming them all back, but we will see. This product really makes a difference on my Solarig cover. I would not install without them!