I probably should have done a better job of explaining what "walking the drill bit across the rollers" means! It's really simple.
1. Get a cordless drill and a 1/4 drill bit.
2. Close the rollers to the tightest setting.
3. From the topside of the mill set the bit in the crevasse the two rollers are forming.
4. Pull the trigger on the drill while applying very light pressure.
5. Instead of drilling a hole in the rollers you allow the bit to go back and forth in the crevasse. Think about walking the bit back and forth.
6. The bit will scar lines in the rollers.
7. Rotate the rollers and do it again until they are all roughed up.
You don't have to disassemble the pasta maker or take it anywhere. It's that simple!
I've been milling mine twice. Why? I batch sparge so I'm looking for an extra fine grind and I did it the first time and it worked so I haven't messed with it.