HydroJim, have you made any further plans or decisions or thoughts on this subject?
You could also do a "deep dish full belly pan", similar in design to those snow floormats for trucks with the 2" walls. Completely enclose the bottom, with a 4-6" lip around the vehicle, then you can jack it up under the vehicle to secure it. Put your "top body" overlapping the bottom lip so rain slides over. Smooth as a baby's bum.
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