There was a recent topic about the virtues of alloy drive gears v. fibre drive gears. This led to a discussion about replacing the fibre drive gear in ATD's and solid, manual adv/retard gears which is slightly off topic. I offered to put some instructions on my website so, for those who are interested, here it is!
https://sites.google.com/site/priorymagnetos/atd-units Just follow the Do it Yourself link on the ATD page.
Moderator: If you don't think this is worthy of a new link, rip it off, no problem!