There's also the possibility we can do something with a microSD card. If you're getting sick of watching Updater.exe fail message pop up, do an experiment to see if it can read from/write to card by trying to backup its NV region. Use the command for later devices (rrgn,154,2:/154.bin): [Only registered and activated users can see links. ].

Ensure it's forced completely OFF, insert the otherwise empty card with the Garmin folder etc. as per that guide and power it back on normally (don't hold screen). If it fails to read the card like that we can then try a modified Ldr.bin to use a different way which involves using preboot.

If you're not confident to make an SD kit yourself i'll make it for you, just let me know Rusty. Us old blokes need to stick together mate.