Some of the options fer the belly pan being considered:
Geared to raise up when backing up (wheel engages a drive shaft to raise belly pan). Very complicated to build.
Stepped belly pan fer clearance of the wheel pant tail. Even though this may be the easiest path, this will only provide a minimal amount of belly pan.
A hybrid of the stepped belly pan and the lazy Susan belly pan section that I attempted before. The lazy Susan support would be secured on the new reinforced support plate and shouldn't have too much vertical movement while traveling down the road. There is a lot of engineering to be done fer this type of setup.
I know I don't want to raise the bottom lip of the front part of the trailer as there will be no clearance left fer the landing gear in the stowed/up position. Another option would be to use a different landing gear setup that would give me more clearance when the landing gear is stowed.
I found and used some cardboard to install on the bottom of Dark Aero, attached a pencil on the end of the tail, and let the wheel assembly draw the clearance arc fer me. That will become my template to make my belly pan.