Hi Scott,
Very nice, and in red it should tow faster.
A couple of suggestions you may or may not wish to explore.
Carrying the wing up high on supports creates extra drag, which can become a drag if you're towing log distance with a 4 cylinder car.
I have seen one trike owner lay the wing along the bottom of his trailer. But you'd have to be careful it won't strike the rear of the towing vehicle in a tight turn and would probably want an extra waterproof wing cover to keep the road grime out.
While length is good for stability on the road, a shorter trailer will get the trike more into the slipstream of the towing vehicle. But if you're going to mount the wing on the trailer there probably isn't any scope for any shortening of the draw bar.
The other is that if you have a full set of travel covers for the trike you wouldn't usually need a stone deflector on the trailer, unless you're going to drive a lot of dirt road at highway speeds. A friend of mine did a Darwin trip towing his XT-912, covered many hundreds of k's of dirt road and his rear suspension struts now look a bit 2nd hand, though the rest of the trike is unmarked as it had it's travel covers on.
Wouldn't mind a copy of your trailer plans. Will PM you with my details.
Cheers,
Glen