We have developed a product using the teensy3.5 and demos have gone well.
My attention is now thinking about production and servicing.

If I've got say 100 units to program. Is the only way to plug them in one at a time or is there an faster way? We currently mount the full teensy3.5 board onto our custom PCB board.

And as much as the code will be tested, we anticipate code will need to be updated on site by installers. How have others managed this ?

Should I expose the reset button ?

Thanks for any help / experience others may be willing to share.