I’m really happy with these (I bought 2, 36 inch ones). I have a 24x36 MiniBlock. An order came in for something 60 inches long. No problem - I moved these from the long sides to the short sides and voila, I had the length I needed. I found that I had to slip a shim between the side of my MiniBlock the vertical side of the FabWing to bring the top up to be planar with the top of the MiniBlock but that’s the only minor problem I’ve had (hence I give them 4 stars).