I was going to do that too, but I was going to use a sheet of plywood 3'X5' and cover it with vinyl. I would then add my barriers and some jumps or bumps here and there.
But ya know what I decided? I don't want to be stuck to a certain layout. I race a track after a day, and get pretty good at it because I know it well. I decided to buy 2 of the Zip Zap track sets so I can change the shape of the track as much as I want. I can add jumps where ever I see fit to put them. Here's a
LINK to a thread of my track I built last night with it. One set of track stuff is just enough to piss you off. I needed at least 2 sets to make a decent track. I may get one more before it's all said and done.