Ralph,
In another life I had a total loss in the use of my right arm and hand, Im a righty. I eventually found the Jobo film loader 2505 and duo-set 2502 reel. You will also need the loading template for 35 or 60mm wide film, or both, if you intend to use both formats. I now have a fair bit of function in the right arm, took about 10 years.
Essentially the film loader 2505 can be screwed or bolted to a piece of timber or a table, which is what I did. The reel is adjusted to the correct width then inserted sideways onto the film loader, then locked in place. This is best done with the right hand, I turned it round and did this procedure with the left hand.
You then place the film guide in position, from then onwards it is reasonably simple in that you can one handed pull the film header through the film guide to the centre of the reel, like a S/S reel.
Now the tricky bit. You then use a template type of half a wheel, called the loading disc (I think that is its name) this is held in place by your right hand. It is with this loading disc that you turn the reel. At the same time it is best if you can hold the film under slight tension with a finger or part of a hand from your left hand/arm. Gravity is your best friend here. I used my left hand and did the procedure backwards using my dead right arm/hand to keep tension on the film.
Once the film is fully loaded you basically pull the loading disc off, then pull the loaded reel off and insert it into your Jobo tank.
The sheet film loader 2508 and the film reel 2509 is what you use for 4x5 sheet film, this is really easy to use single handed, either left or right.
The hardest thing I found, was pulling the paper off the film with regard to 120 film. I ended up cutting with an extremely sharp knife as I couldnt use scissors left handed in that environment.
If you are using the Jobo rotary system, then I suggest the fitting of a lift will make things much easier for one handed operation. By this I mean the initial insertion of chemicals is easy and the lifting of the tank for emptying can be done in a controlled manner and with precise timing for the first and usually most important solution. Trying to get the tank off one handed is not the easiest procedure, especially if you are using the larger diameter tanks.
I have my Jobo instruction sheet that came with my reel and loader. It is A4 format, I can scan and send it to you, English or German, or both, your call.
Mick.