Kira managed to recreate the issue as of my understanding. Tho with the fewest of mods possible too. Tho I'm clueless on how. I did look at the code. the think to me I couldn't see any thing causing the issue. Also unsure what I would be looking for. So I'm not to much help.
FYI, it was the function removing old valves from the tech, apparently (though it was exactly stated what to remove), it didn't like the all-corners storage tank, i still have no idea on the cause, just replaced it with a function used by bob which seems to do the trick