That's a lot of awesome info! I wonder if there is any processing data anywhere on the sleeve or the LP, like abbreviations for the manufacturing steps.
I will definitely look for Canadian prints.
I have a lot of Russian records, they are awful. Yugoslavian records: flawless. In the 70s and 80s, there was no competition in Eastern Europe. Every company (other than hairdressers and mechanics) was a monopoly in their region. They could make horrible or flawless quality products, it did not make a difference to them. The biggest factor was the culture and the heritage: e.g. Hungary was a science and math oriented country, full of nerds, which showed, musicians cared about quality in every sense, and they couldn't (I assume) cut good copies just for themselves - if they wanted a good LP, they had to have a good all around process.