Threads go in and out of focus. But OP rules, right? If you don't do a build thread, then a generic 'single wheel trailer' thread would be new. The Mods can split on off for you.
I'd contribute:
That last one would be a fiberglass rod geodesic 5-wheel Class-C motorhome. Or at least the start on one. I'm trying to get a 3D modelling work flow up and running again.
edit:
Ignore the triangles over the windshield and doors. Now that I think about it the whole motorhome body could pivot at the jack points just ahead of the rear wheels instead of flexing.
Whee!
Sorry about the thread-jack.