I’m still regularly oiling the Singer 27 treadle machine and attempting to remove more parts for cleaning. My husband has been helping, and he was able to free several bolts! I did take a tool to a thumb screw for the back plate; I figured if it was going to break, better that I’m the one that breaks it. I wrapped the knob in leather, then used an adjustable wrench, and slowly turned the screw. Success!

I photograph all the removed parts and put them in a labeled ziplock bag with a spray of PB blaster. When I get all the parts free, I’ll clean everything before putting it back together (fingers crossed).