Hi,
That's because it's been explained but despite it being simple, the fact the western companies and some eastern companies with more proefficient sale power were lagging behind, it have been forgotten.
The record shouldn't be pushed on the turntable but rather gently coupled, Victor pictures makes the most natural record movement look like an ufo actually, that's why Victor pumps are gentle, because cutting lathe pumps making the records are gentle too.
If you push it more, you lose dynamic and transient attacks, the sound change as well, some might like it better though. 253g is good weight, just make sure it's also damping well vibrations.
I am not sure Sony understood those things at the time, but they hired a lot of private companies or people to do their job, then Sony was manufacturing and advertising but the same can be said to a lot of companies.
Some people also claimed they worked for some companies but not saying after those companies built most of their high end stuff (Techdas founder arrived after RX-5000, BL-111 and so on were already built, another one arrived in late era of Audio Craft and so on). Some private companies Sony used also worked for Victor too but Victor needed them to a lesser extent. It was a smaller world altogether.
Thank you for naming the record weight but I am not sure to fit this honor as I don't share well all knowledge I can gather.