Great and informative reply from you and you have raised my interest in retrying my previous failed attempt on my Jupiter9. I have purchased a manual file from Sears and I would attempt manually to get the edge shaped pin hole as shown in your picture. I have a Vivitar "Series 1" 70-210 f/3.5 from Kiron. It is my best zoom in 70-210 but it is way heavy that I sold it for cheap.
Thanks again for the help and picture.