I was referring to the weight of the camera, especially with a prism, to need the horse with the saddle to sling it over the horn by the strap. ;-) Because of the weight and center of gravity, I felt the prism was not useful at all.
I do not mind the weight, without the prism, I am quite happy with the view from the hood, and in many ways prefer the perspective, probably a throw back to my old Rollei days.
If you have an old roll of film the common procedure is to load up the camera, take off the lens, set the shutter to B, and mark the edges of the frames with a ball point pen as you advance the scrap roll, then look at the film to see where it was indexing.
I used to bring these home and peddle them to help pay for the trip, had a friend at FotoSkoda who would have them gone over to weed out the ones with obvious problems, lots of the adjustments, etc., were simple.
I have seen the odd problem, like all the speeds were OK, except 1/125 was B once-- and as the Kiev 80 screen fit Hassy, and without the frame the Kiev 60, was probably two stops brighter than the Pentacon, plus had a nice split image, --cost $30 new, I fitted three Pentacons with those. My friend Jorge had an optician cut them for us.
My Czech friend still uses one, I still have a Kiev 60 and all the glass, love the fisheye, but I ended up using the glass mostly with the adapter to Mamiya 645, which has the same strap mounting lugs as I recall.
I have accumulated adapters to K mount, Nikon, Mamiya, and perhaps Pentax 645, and found a LTM to Pentacon as well-- close focus of course. ;-)
I would probably recommend you find the right strap ends, and perhaps think about fitting them to a good strap or some sort of adapter to common straps?
I had three serviced in Prague, always got a little bag of broken parts back with it, but it was one of the few places I could get the camera serviced -- I do have access since to a number of repair guys in the US now, so do not know if other options are practical now.
People here used to want a lot of money to service them and they did not seem all that familiar with the camera judging by the price/quality of the service.
Kiev USA never fixed anything properly for me and charged me a fortune in shipping each time I send a camera back to them, even though I knew someone who was friends with the owner who called the guy up--
I think any repair in the Czech Republic, by law, has a warranty of one year, Czech's have long had a reputation for having good "Czech Hands" to fix almost anything.
As you can tell by the rambling post, it all got to be complicated, but I liked the design, the glass, and the photos, but not the aggro. I was fairly stubborn on using them, just seemed a system that should work.
I have a mix of glass sitting around, PM me if you have a desire and I will check through the stuff lying about to see if I can help you. I only have one 30mm fisheye left, but they are common from what I see.
Regards, John