Lathes come in handy. This task, installing a Treats Moby CDI on a Peugeot, becomes problematic because the stock flywheel nut doesnt fit in the CDI magneto. In the past, I would grind out the lead part of the nut, creating a skirt that could slip into the magneto. With the Lathe, we do the same thing but it looks a lot neater and takes 3 mins.