The files below are everything you need to build a TinyTendo of your own.
Extract the ZIPs to get the STLs for the 3D parts, gerbers for the PCBs, and BOMs for ordering parts.
There are however some parts that aren't available from conventional electronics parts distributors, and therefore must be purchased separately from other sources, these are listed below:
Wiring diagram made by FenrisWolfRetro.
NES Styled Multicolor housing print option made by Wesk.
Button Membranes
TinyTendo uses DMG or NES buttons, you can use whatever ones you like. (The membranes must be DMG, though)
Screws, M2x5mm, M2x6mm, M2x8mm, M2x10mm
M2xL3xD3.5 threaded inserts Used with Inserts shells
DISPLAY:
TinyTendo uses a Tianma 3.5" TM035KDH03 LCD panel with an MTM-3520CLD driverboard.
Unfortunately due to parts shortages these aren't as easy to find as they were, and there's not a good source for me to link to, so you will have to find a source on your own. :(
It would be possible to adapt the design for another LCD/driverboard combo, but that isn't something I personally will be doing.
CHANGES:
Housing updated to be able to use threaded inserts
Screen moved up to even out bezels
Audio amp and Button PCB altered to improved screwpost positions in shell
Fixed duplicate reference in Chargeboost schematic
Fixed BOM errors