Designed after the work of IamDroBro (and mb also Emotional-Priority49) on Reddit for the RG35xxsp.
Hardware required:
It's important to get the exact adapters mentioned/pictured or they won't fit the model. I have allowed for tolerances where possible. The weights can be added to make the dock heavier, but are not strictly needed.
A model is also attached for the two adapters (slightly oversized, again for tolerances) should you wish to use them as toolbodies and design your own dock. The two adapters in the model are in-position relative to one another for the RG34XXSP.
(note: I have a dock for the RG35xxsp here - https://www.printables.com/model/1412822-anbernic-rg35xxsp-dock-usb-c-hdmi)
The author marked this model as their own original creation.