So, cold weather brings time to learn Sketch-Up.
I'm doing a mind-dump of the bed build...when things get warmer. Like above 50'ish. That could be March around here (Salt Lake).
Not every structural detail is shown. Might get to those if time permits.
The under-deck ramp boxes go all the way across the bed. There will be a wall inside keeping the ramps from sliding across the width of the bed. That allows for 2' deep boxes on the drivers side and the needed 6' deep for the ramps.
The bed width is 102". The rear boxes are 22"w x 31"d x 18"Tall. Should be big enough for a generator on one side. I'm also thinking about a fuel cell between the frame rails for the generator, located just over the rear axle.
I might add skirts around the wheels. We'll have to see how the build goes.
The deck on my MDT was diamond plate that was screwed down. I could remove any of the sections as needed to work on stuff under it. I'm thinking of doing that with this bed. NOT the polished diamond plate. I've had my fill of keeping that stuff looking nice. Most likely will bed-liner the entire thing. I used gray color before. Shows dirt more, but not so hot in the summer months.
We have a few come through our RV park every summer. Haven't heard anything bad about them, but nobody raving about them, either. Most of them aren't in full time use, I suspect, but summer long or shorter. Haven't looked at the weight capacity, or tank sizes.