My electric toothbrush does 30 seconds per quadrant, 2 minutes total. I’m 38 have zero cavities and my teeth are fine. I only brush once a day.

How the fuck could they not even give it a new name?! One of my favorites as well.

Variable speed and fine grit. I have used the one I linked a ton to sharpen all sorts of tools. Also it’s literally listed as a tool sharpener.

Mini belt sander/sharpener, belt should contour to the blade shape. I got a cheap one from Amazon works well for most tools.

https://www.amazon.com/gp/aw/d/B07CVN8HV5?psc=1&ref=ppx_pop_mob_b_asin_title

We exclusively repaired for schools, kids puke for like… no reason.

Yeah we had to institute a throw it straight into the trash policy because of pukey Chromebooks.