When I first designed the fiberglass Jeep-tub trailer kit, the inner fenders were designed to be bonded to the tub sides with fiberglass. It's a pretty simple process, using materials available at any auto parts store - wet the area with resin, put some fiberglass mat on the area to be bonded, soak the mat with resin, place the fender and weigh it down until it cures. It forms a very strong and structural part of the trailer tub.
Apparently some people are hesitant to bond the fenders on with fiberglass because it's something they've never done before, so Scott at Compact Camping says he's getting ready to introduce new inner fenders for the kit that bolt in place.
Here's what Scott says about the photo above:
This is the plug for a new Inner Fender mold design. One thing that caused some people concerns about building a J-Series Dinoot was fiberglassing the inner fenders in places. Fiberglassing isn’t a difficult skill to learn, but like anything new, there can be some apprehension.
To simplify the building process, I have development a bolt-in approach for attaching the Inner Fenders. Previously the mounting flange on the Inner Fenders went up. On the new ones it will go down and be bolted in place with hidden bolts.
Expect to have the mold ready for pulling test parts in around three week, stay tuned.
I'll post news on this development as I get it.