This is a really great idea, I was wondering why some of these things were missing for sure (specifically no laser turret in the EM plant was bugging me, lol).

One candidate I think maybe for the foundry is Space Platform Foundation. It's made out of two things the foundry specializes in (copper wire and steel) and you need them in vast quantities that would greatly benefit from productivity. Similarly maybe endgame foundation can be made in the cryoplant, but I'm not there yet, heh.

When looking for things to add I just sort of browsed the factoriopedia, and since then I've added a few things as they came up in my own game, so some things just went under the radar.

I forgot to add a few things to the mod page (foundation in foundry is one of them) but space platform is a good call. It's something else I considered but I also thought about a more efficient recipe using LDS so it went unimplemented.