Finally decided the brakes weren't working on my trailer and pulled a drum to check them out. Lots of rust, and no indication that they were working. First I bought replacement drum backing plates (with shoes and hardware), but decided to convert to disk. Returned the drum kits and ordered Kodiak disk kits.
This set of pics shows the removal of the old drums and backing plates.
This set of pics shows the removal of the old drums and backing plates.