Originally Posted by
gfk_velo
... so unless mechanics look at the video, they might not check that they have removed it, before trying to pull the crank off - which is usually a fatal error, as far as the crank is concerned!
I can't remember the spindle bolt washer specifically but would have surely looked for a washer in that application so probably pulled it out and replaced. How would it be a fatal error if one had left it in the arm?.