@CaseySJ I've gone through the start post and (a lot!) of posts following. Thank you very much for all the write-ups you do, I've already learned a lot.
I have a current build (which differs from yours) on MacOS 10.15.4 which is working perfectly fine (stable-wise). I want to replace it with new hardware. I want to basically buy the same build you have (some components I already own, such as the Fenvi, RX 570, SSD's).
So my question; can I use my current (pre-installed) SSD, using your EFI, and replace mine? If so, which files should I use from your start post? What do you recommend in my situation?
Hopefully, you can help me out a little bit.