RE: warbird trailer
Geo,
I use a wall-mount rack system as indicated. Each inner bracket (in contact with the fuselage) is bolted into the steel support bracket, then into the trailer vertical framing). Made from 1/2" plywood, they're cut to the plane's former profile, taken off the plans; fits like a glove.
Not one transporting incident in nine years.
I fit five Ziroli/Meister-size models and all support equipment within this 6' X 12' trailer.
NICK