mmalone,
Thanks
The trailer is a haulmark 6 X 12, and it's just the right size for me. I made the racks out of MDF board, which is similar to particle board, but much stronger, and much denser. It can be picked up for about 20 bucks per 4 x 8 sheet, and is often used in making furniture that is going to be painted, so I figured it'd be strong enough for what i need. The racks are attached to the trailer wall frame by way of 4 inch strap hinges. The deadbolt locks on the bottom go into holes that I drilled out to size. I tried to place the locks high enough that they would go about 1/2 inch into the floor, but no more so I didn't have to drill all the way through the floor. The rack will accommodate pretty much any 40 - 60 sized plane. On my next one I'll have a rounded fuse slot to accept my Texan once I get it built.
Actually, I'm fixing to build two more for the trailer and I think I'll do them exactly the same way, so I don't guess I'd do anything different. That rack is actually full with planes I currently fly, and I have two more waiting to be built, so I'll need another rack soon. I'll just go ahead and build two more. The nice thing is that they're not in the way until I need them!

As I said before, I'll also be painting these racks next week. I'll get some final pics next week or so.