Hey,
I just downloaded your version of the Nixie tube mods. Firstly I'd like to congratulate you the effort, UPS friendly version is truly UPS friendly.
There I have to point out one giga-flaw that went under the radar. Since I installed the mod I had TERRIBLE lags whenever I placed any blueprint. No matter the size. Big ones could freeze the game even for couple minutes. I checked, disabled the mod. The problem was gone.
I am programmer myself and I decompressed source files. I fixed the issue, the problem is - you commented out the debugger function content... but not the dump(o) function contents. The dump function is recursive and is being called on every single ghost placemend during blueprint placing process. The result is gigantic callstack that occurs every single time you place a ghost in the game.
If you want some details and proof please contact me, I can provide you the video proof / stream of it.
Cheers!