Throw good money after bad?
Nah...
If the Kiev screen turns out to be bad, throw it away and get a proper one.
What if you find someone with the right tools, who is willing to spend part of his - no doubt expensive - time checking the Kiev screen, and it turns out to be bad?
Are you then going to try to adjust the 2 bit screen (good luck!), or even waste a perfectly good camera by adjusting that to the screen?
No... You're going to throw the screen away and get a proper one.
Hasselblad screens are expensive. But at least you can be sure they work.
So just spend the little amount a film and processing it costs, and be done with it.
It will do no harm trying. Don't worry about things being thrown out of a narrow tolerance range. Unless you use brute force, they will not.
And we're smart enough to know we shouldn't use brute force when things do not go the way we would like them to, don't we?
And you may well find the Kiev screen works fine too.