THX. Luckily, I didn't remove the horizontal arm shaft. The puzzle pieces are the needle bar, presser foot, bobbin winder, tensioner, and flywheel. Reassembly of the parts look doable with the help of your references and the MUV cleaning/oiling YouTube video--only thing MUV tutorial doesn't address is needle bar.
Maybe 128 will be back in business after this weekend. Fingers crossed.