More common parts missing from LDraw

[tom alphin]

is there a list of very old but missing parts? from 1950-1980 for example...
most of them have to be done manually.

Rene, I can create that list pretty easily.  (I had planned to do it by decade, since the parts common to each decade aren't necessarily those which are most common in previous decades.)

I will update the original post with most common missing parts from that date range soon!