I have a ton of blueprints and schematics on my OLD very outdated github if youd like. post coldwar stuff, unpublished 571 stuff.
https://github.com/Nsomnia/ColdWarSubSim
I have more info on my newer repository but its mostly fleet sub stuff so far sicne thats where my game starts. When I get it commited to a public repo I'll let you know. And organized for that matter.