Do you have a list you would be willing to share of trusted manufacturers & suppliers that you reference for different products or materials?

I used JLCPCB for the pcb cause they integrate well with the pcb design software i use (kicad or easypcb)

And I used pcbway for the sheet metal fabrication

Honestly they are both great and similarly priced

At least in the last video it seems like he used both PCBWay and JLCPCB for manufacturing