Tugboat15,
I really like your posts and wire. It's going to add something attractive to the layout. Adriatic always has a great idea, and the one about using the fencing as bus wire is another one.
My overhead layout has been finished for 3 years. I have posted many times on shelf layouts, and I had the perfect situation for one in the basement entertainment room. I considered fencing many times, but the only two times cars have fallen was because I was talking instead of watching. Never had an engine fall, and no cars ever broken, just a few of those cheap plastic trucks. I prefer a double-tracked system, and I run 2 MTH engines on each track, controlled by DCS, and powered by one PW ZW.
These pics should show how the layout was done, including supports, wiring, backdrops, lighting, and accessories. Feel free to ask questions or make comments.
Good luck and best wishes on your newest train project.
Jerry