UPDATE: Fixed lower support size.
My Robbe U47 Tech Rack. This is a redesign of the tech rack using all the same hardware as used in the basic dynamic build. I never liked the one you build with the kit. Flimsy, parts breaking, leaks. The new design has been 100% leak proof so far. Most of the electronic shelves can be printed with low infill, but i recommend building the endcaps, servo tray and engine mounts at 85% to make them stronger. Also on the very end cap, I brushed on a thin layer of epoxy to make extra water proof.
Also the original plans called out for 2 6V Batteries, so If you are using those, print two of the battery trays.
I used 4 pieces of 8-32 threaded rod to put it all together and 4 nuts.
I am currently building a couple parts so that the rear of the sub can be unscrewed to do maintenance. Never liked the epoxy and run it til it fails way.
Enjoy, I plan to turn my sub into a static diver over the winter after I get all the cosmetics done.
UPDATE: Just added optional support brackets to be able to remove rear of sub. Also posted my bellow adapter and magnetic link