About a decade or so ago, we purchased a used boat trailer from DMAA that had been used to store the Carrier Deck on, I believe. In three weekends, Jim Kirby, Phil Dunlap, Mike Greb and myself constructed a 4x8 plywood box and bolted it onto the trailer frame. The "door" is hinged at the top and a recent modification was to add an aluminum angle piece across the bottom to support the weight of the door, rather than having the weight on the hinge. Left out in the elements, the original door finally rotted out and was replaced this year. It has served well, from Dallas to the VSC a few times, to Wichita and Topeka annually. Notables such as Lew Wollard and Mike Greb have grabbed quick catnaps within the confines of this rig, with no known deleterous effects. It has been in use for about ten years. We had our house sided and got the contractor to cover the trailer with siding, it is some kind of painted sheet metal. As chronicled earlier, wearing the centres out of 12 inch tires was a problem, but was solved by using only 30 psi of air in the tyres. Never has a plane been damaged in transit, even through two blown out tyres. (Unlike modern air transport tyres, once the thread in the tread becomes visible, they are about ready to give up the ghost.) The key has been to seperate the planes, standing on their noses, with one to two inch foam rubber. Lots of it. The planes probably jostle around in there, but they never contact one another. Perhaps I will place a picture of it here soon. dg
Addendum: there is at least two inches of foam rubber on the floor of the trailer, to cushion the airplanes' noses.