"is it a problem if we have different screen sizes?"

Not for us 😎
We have many customers who use different screen sizes.

SignTronics solution?
Our custom-made masterframe.

This is available as an option and is adapted exactly to the size and requirements of the customer.
As we have done here for a customer in Poland.
This allows several small screen frames to be exposed in one exposure process.
And by the way, it also saves a lot of time.

Clever isn't it? 😉