These things are awkward, antiquated, tough to set up, weigh at least 20 kilo's when mounted, parallax challenged, difficult to compute exposure loss without TTL metering, and slow to use.
In short, a true thing of beauty from a different era....
Relax, set it up in your backyard, and use it to get a shot of that cardinal that visits, or better yet bring it to your kid's sporting event and have some fun watching people's reactions.
Don't listen to the purists...these are fun as hell to use when you have the extra time on your hands, and you can get great shots too.