RoosterW — Good idea about taking pictures. If I ever have a "next time" I'll be more careful.
"cat"astrophy — Thanks for chiming in. This machine doesn't have a screw in the end of the tension knob. I included that photo and meant to point out my goof-up: I soaked the parts in Krud Kutter degreaser and burned the paint off the numbered tension dial. A warning to all!