I like this allot more than the bright red, but to each his own I guess. The fenders come black and now the frame matches. Also the photo above doesn't show the pressure treated 2x4 spanning the center width. I notched it to fit and inserted lag bolts in the end. This will also allow me to simply drive deck screws into the center once the floor is on.
Here's some shot's of the floor:
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You're looking at the underside of the floor. The floor was constructed with 1/2 inch plywood on a 1x2 frame. The wooden frame spacing was identical to that of the trailer so it could simply be bolted to the trailer frame with 3/8 bolts and the 1x2's were attached with Titebond III and wood screws. Wood screws were overkill and I would use brads next time.

...and here the EPS is installed in the floor:
I let the roof coating dry for several days before attaching it to the frame with bolts and silicone sealant.
