HAHAHA!!!! I actually made the thing years ago. Slapped some velcro all over it, stuck on some feet and off I went. Have used it off an on over the years. A year ago or so I replaced the stick on feet with some that screw in. It does the job. For our gigs, I'll toss everything on the Pedaltrain board where there are a few additional pedals.
Just to clarify, multiple tiers: having multiple lines on the same level would certainly qualify. I just find it more difficult to stretch over pedals on a flat surface.