I'll probably try that first. I would only need to put flannel on about the bottom 4' (or 44". lol) of it since it wouldn't go down any more than that (it's above my ironing board). If for some reason that causes problems I can always take the fabric off later and replace it. Now I need to get some flannel. I'll have to look for the gridded kind.
eta: I found 57" wide flannel which will be plenty