I never tried to use it, but after I got the retro-bug I tried various places to see if I could get it serviced.
Nobody would touch it (they do Flexes but not Cords).
I had great fun doing some colour with the DSLR and am even learning to like a tripod since switching to a ball head on the recommendation of Phil Rogers.
Nor, though, is it likely to be the end of the beginning.
There is also an optional adapter called the Photo Plug that you can buy on ebay which actually measures timing of the light through the shutter to an optical sensor that transfers timing via the microphone jack. Calumet made a popular shutter tester that appears from time to time on e Bay.In 1982, when Rollei went bankrupt I was able to obtain the test equipment, special tools and a parts supply from the west coast division. I have been using the old fashioned term “overhaul”.What I do in a shutter overhaul, for example, is to, (using Rollei factory tools where needed), disassemble the mechanism, including the shutter blades. There has to be some lubrication in the shutter mechanism and when the camera is exposed to very hot conditions this lubrication sometimes breaks down and runs onto the shutter blades. A very small amount of oil on the blades usually doesn’t cause a problem unless the weather is extreme,(cold or hot).I knew there were some interesting, faded colours in the old transport office and the goal was to try to capture them with as little intervention at the "post processing" stage as possible.Another way of looking at it was pretending that I had colour print film in the camera. A few are completely untouched bar a little sharpening.