Where can I get a long metal file (400mm+) or something else to remove the back end of a bottle cage rivnut to fit a Di2 battery deeper in the seat tube?
Even if you found one long enough but with a small enough radius to fit down your seat tube, what would you do with it? Mostly slide off the side of the nut into your tube is my guess, as you'd have no control.
Where can I get a long metal file (400mm+) or something else to remove the back end of a bottle cage rivnut to fit a Di2 battery deeper in the seat tube?