Art I wish I could offer expert advice but being more of a clutch-gearjammer cubber I can only offer sympathy. Will keep posted to see how your diagnosis turns out.
Craig
Justin and Marty
There was an early options brochure, small size, that showed that rear full size light as an option for the Original, before the later plastic lens "grote" light was available.
Kraig -
"special duty equipment SDE?"