Unforgiven supplied templates for a car hauler but not 1:1 scale. I got sick of trying to convert the measurments and so came up with this.
My template is 1:1. Print, cut out, trace onto styrene, cut, build. Couldn't be easier. I'm going to the hobby shop soon to get some supplies - diamond plate Evergreen for the ramps, sheet styrene for the rest. I'm thinking of enclosing the center part and cutting doors in the sides (where it says "Template .
I'd suggest not cutting the wheel opening until you have the truck that you're going to attach the hauler to - just in case you have to change the location of the opening.
I'll post pics when I finish one, but if somebody else gets there first, please let me know.