OK, I bought a bunch of Scalextric tracks, and went digital.. BUT, I'm looking for a universal system for ALL tracks larger than HO. If you flip over the Sport track, there are circles, 1/2 inch diameter, that you can put dowels into instead of the plastic crap they give you for banking turns. I cut a bunch, 1/2 inch intervals, starting at 3/4 inch. They work GREAT on floors and carpets, even if the track slides a bit now and then from overactive participants. You can snug up loose ones with a wrap of electrical tape. That said, the cost for barriers/aprons/skirts for any of these large sets are almost as much as the track itself. Since I'm on the floor for now, and seriously in need of aprons, I'll have to make them myself. Warped/damaged plywood is up to half off at most lumber stores. Usually 25%. My track is 5/16 thick. Here's my thought: Buy a 1/4 inch thick sheet of plywood, some glue, and some 5 X 7 aluminum flashing sheets. Trace out an R2 border on the wood, and cut out 2 of them, 1 for the top, 1 for the bottom. Drill 3 1/2 inch holes in the bottom to hold dowels. Cut the flashing into 1 inch strips, glue it between the 2 sheets so it sticks out just far enough to touch the 2 dowels in a curve section. This lip will hold the track at the right height. A pair of rubberbands to hold the apron snug to the track. There's a 1/16 drop between the track and the apron. And the wood isn't an ideal surface. Some kind of covering needs to be glued to the wood. I'm thinking maybe a foam rubber? Or maybe cut open an innertube and use contact cement to glue the clean side up? I'm at a loss. Someone out there somewhere must have a solution.. I even thought about adding sand to flat black latex paint and painting it.. I want the surface to be a bit different from the track. It is on real tracks, so why not here. It's a bit expensive, but there's also a faux finish sand paint. I used it on some planters before, and they look like sandstone. Everyone here has been great so far, and I've tried to reciprocate. So, anyone with a different manufacturer track, please add a photo of it, along with dimensions and a ruler next to it. We need to see the track curve up-side-down, and to know the thickness. If any of us have ideas on how to make aprons for it, we'll all help.