I would like to insert the technology research of 2nd edition into Spring 1942.
You’re right about the paper IPC’s - they’re missing from the Spring 1942 edition and I also use the IPC notes from my second edition game.
I don’t recommend using the technological advances from the old game in the 1942 edition. Apart from A&A being better without tech anyway (imho), the second edition advances are really unbalanced and tend to disrupt the natural course of play, to some degree even turning it into a game of chance rather than skill.
I don’t like tech myself either since Classic but I’d say that you if need to have tech on your games then check the AA50 tech chart. It has nearly all of the techs from Classic and 6 new techs.