I'm reminded of this thread from 2015:
ecomodder.com/forum/showthread.php/camper-build-using-old-hi-lo Hersbird's Hi-Lo. The thread is subject to link rot. Maybe a PM would shake some loose?
TWhat I wanted to point to is the pilasters on the front. They seemed to be successful, but the only surviving picture you have to know what your looking for.
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The idea came from some research paper, I used it in this design for a pickup truck camper
It's a hack, to radius the front corners without cutting into the structure. If you own the thing outright, cut the right front top corner off and have a symmetrical gable on the front.