FYI, we've closely calculated current parts costs plus labor to solder the 5351 chip on the kit's PCB and check all connections.? We found that we can sell the full kits for $35 USD (this is a kit, less the Teensy 4.1 and display) if we have the user pay the shipping (due to current increases in mailing/shipping costs by USPS and the various courier services we have to use).
There are some restrictions for international customers, and these are spelled out on the TSW website main page () as well as ordering information.
Thanks for looking,
Jim - W0EB
TSW Project Coordinator