Got this when they started up and have since modified it to similar version of what they currently sell.

Platform, two lockable drawers, slide out platform on rt side (standing from the back) and section with support brace able to be added on left side for full platform covering rear with seats folded down. My plan was to have the rear seats out and in current state, the right side seat won't lock back due to rails extending further back than originally intended. Could be worked out with some careful grinding of center rear brace. I cut the drawers down to the current set up "low profile" version and left side is set a bit higher than left due to platform sliders on right supports but with easy clearance for the slide out tables that can be mounted on bottom of drawers. It's made of baltic burch and I had them coated with a water based clear stain. It has dividers in each drawer. The wings fold over to sit just above the wheel wells allowing access to side storage.

It secures with turnbuckes to the OEM tie downs or will throw in a base plate and shorter turnbuckles. They can be secured in line with the legs and
allow better access to side areas at front. Made for 5thGen so can't say how it may work in other versions.

$700.00 - No shipping - easy install and will work with standard rear area without deck. The platform was added to ensure a solid level surface but feet adjustable.

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additional pics. Fridge slide not included. Drilled for the Alucab tilting slide but flush using Tnuts so no problem with it removed. Front pieces removable. Just personal add on from spurs.

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bump

I'm building a platform based on this design for my 4th gen and fwiw, $700 is damn near the cost of materials alone.

I believe you could easily slap some shorter rails on for the slide out shelf and be set.

In looking at some of their new builds for the slider, it doesn't appear they're going full length. You could mount it on a shorter rail only using 2 of the 3 legs to mount to. Set the rails back from the edge which would possibly give enough room for it to nest properly. I think they're not using locking slides on the front, and letting the seat hold it in the closed position.

That said, I'm a little nervous about that part of the build. Planning to build the main platform first then figuring out the slider part. I'm considering just not mounting the moving part and securing it flat on the main platform when not in use so that the sliders can tuck all the way back, for sure. I'll run some flat stock between the rails with holes. The boards will have some nubs (not sure if rubber or short bolts) that will sit in the holes, and will "secure" with velcro on a front bar.

Not totally sure, yet. I'm kinda surprised no one has jumped on it, as the feet, hardware, rails, and board are well over $600 if you bought them and put in the man hours to measure, cut, rout, drill, etc. That much good Baltic Birch is $300 right now. Realistically, $700 is below the sum of the parts.