Hi Chris,
Thanks for suggestions :-)
The scale is not my problem, though.. rather it is the quality of print.
The reticle can have elongated markings for Octans asterism, so even 20% error in scale would not be really a problem.
20 years ago I would solve the quality issue easily - I would simply take a photo of the reticle model (drawn with black ink on white paper), using classical film camera loaded with graphic film, developed it in my bathroom and make a contact copy from it. All for couple of bucks and very little effort.
Today, with all those new technologies available, something essentially trivial like this is not possible
!!! Or, it is actually possible, but restrictively expensive...