My plan is to put a aluminum "strap" under the bolts in the rear - I would not think there is any problem adding a plate - the only thing I can think of is you will see more rivets in the rear and the fact that steel is pretty heavy - I'm trying to bolt down my "rear" as best I can and also trying to take out as much weight as I can in my rear - a physics thing.
1956 Flying Cloud
Four Corners Unit
Albuquerque National Balloon Fiesta
Vintage Trailer Academy - Formerly the original