Fitz, you should be a brain surgeon! The skill and "cojones" you are showing is beyond belief. As stated by a far more eloquent person than I, the fact is I am damn lucky you are working on both of my K1000. Most anyone else would have given up and way sooner. Yes, I am very thankful for the work you are doing.
BTW, I looked at one of your pictures and is there another piece of metal stock in the driver? I have copied the picture you took and I have placed a pink arrow to the "stuff". Oh, and you must have eyes like a tiger to see all of the small stuff inside the driver.