I likely misrepresented my needle size. I have learned now that there is a needle system number for these machines. And then size and type needle. I apparently have a needle system 135x17 with size 21 needles??? Please don’t believe me until I figure this out. This machine has a thread Oiler wow . The service manual has a lot of timing settings etc. this thing is way out of my wheel house. My local shop is a Bernina dealer he and the shop are amazing. I’m going to try some more stuff but I think I need professional help not only for my sewing machine. Lol