I'd like to start my giving primary inspiration credit to vinikirst who made this design that was featured in a Zack Freedman video, but otherwise this has been recreated from the ground up and does not reuse any of their models directly.

Behold the Gridfinideck: A folding mobile Gridfinity-based platform for whatever you might need such a thing for. This assembly utilizes Gridfinity Baseplates, modified with rod guides, to allow for a free-form customizable DIY Cyberdeck type thing.

The framework of this design is based around 3/8" wooden dowels, but I apologize in advance because this design is a complete mashup of imperial and metric units. I will break down the parts list below, but the basic design is this: The brackets on either end have 9.5mm holes that tightly grip the dowels with a friction fit, no glue required. Be warned: this fit is seriously tight so make sure you have all of your pieces on the rods before you put the final brackets on. The Gridfinity Plates slide on these dowels and have 10.5mm guides that allow them to be re positioned easily. For a more snug fit that is still re-position-able you can use a 10mm hole, such as on my Steam Deck mount (available now!).

The structure of this design is a combination of friction-fit wooden dowels and the three piece bracket assembly that make up the hinge on each side. These hinges allow the assembly to go from a folded and locked orientation, to a Cyberdeck-esque low slung open format. What kind of things can you put on a Gridfinity plate that won't spill all over the place then folded up? Idk, that's for you to figure out!

Everything has been designed with easy printing and minimal support material in mind. As far as the length for your wooden dowels, this assembly is 420mm long (nice), or about 16.5", but really you should just cut them to the length that works for your layout. It can be as wide or as narrow as you'd like it to be. It can have plenty of spare room for repositioning components or zero tolerance for a no-slip setup. It's up to you.

Here is the parts list for the pictured assembly:

• 4 x Dowel Brackets (now on version 2, which is easier to assemble and uses less material)
• 1 x Linkage - Left
• 1 x Linkage - Right
• 4 x Locking Rings for the hinges (You can print more if you want to lock your sliding plates in position)
• 4 x 3x4 Baseplates (there is no need to print these with support material, even if your slicer tells you otherwise)
• 8 x 3x4 Baseplate Legs (I designed these legs to be printed separately from the baseplate to avoid needing a bunch of support material. Use superglue to attach them via their indexing notches)
• 2 x 2x4 Baseplates
• 4 x 2x4 Baseplate Legs
• 2 x Locking Latches, if you feel like it.

Assembly Instructions: Look at it and do the same bro.

The bin and link for the middle 4:1 Monitor can be found here.

Keyboard mount here.

Some general notes and musings:

• This is printed entirely in PETG, which it more flexible than PLA. I do worry that the dowel brackets might crack if printed in PLA due to how tight the fit is.
• This design might end up needing a kickstand, or perhaps just a rework to hold the upper portion at a higher angle. Edit: After loading this up with the middle monitor and the keyboard/trackpad combo there is actually enough counter weight that no kickstand is needed, but even still I am planning to redesign the Steam Deck mount to allow it to be moved down by one rod to lower the center of gravity.
• The dowel side brackets have been redesigned to allow for easier assembly as well as reduced material usage and print time. There is now an "inside" that has slightly flared holes to make it easier to get the dowels started. There is very small text on the side of the part now that tells you which side is the inside. This text might not resolve on the actual print, but really it's just there for reference when orienting on the build plate.
• I would like to potentially redesign the baseplates (and I guess any other thing I design for the rails) to have open ended guide rail loops so that I could "snap" them on and off the rails without having to disassemble the sides and slide them all the way off. The problem is that I don't know how I would design something like that that wouldn't also require a big fat raft of support material. That's why I made the current two part captured design.
• I plan to make standalone pages for each baseplate once I am done prototyping, as well as making more sizes.