Now there is more than one, wrfdunit1 can chime in with his own ideas as his pics. are really cool also. Please post your work for others to see. The wiring wasn't too bad, I just ran several sets of small wires to each corner of the room and wired them in so there wasn't any huge drop in power...worked well, no big deal.
I used just your basic 1x3 from Home depot but spent quite a while picking them out to make sure they were good and straight. There isn't a roadbed, just nailed the flex track to the wood itself, no problems there either. It is about 7.5 ft. above, enough to clear the doorway into the kitchen. The corners I started with the mounts, coming out from the edges to the first stud on each corner, then you just cut your wood to match, cutting the edges into angles so they would meet up nice with the straight sections. I generally went every other stud down the walls to provide good support, but this is up to how you want to do it and how straight the wood is. If there was a small bow, I just added another support. It was just a play around thing to get cars that would work really well, but once I found the combination, I haven't had any problems. Due to having some sharp corners at my doorway entrance I can't run any huge length cars but that is the only area where I had to be careful.