Gosh, that brings back memory... fixing a tech tree is quite the ride -- just imagine how complex a whole bunch of twelves can be.
Sure was fun to fix a quicky 'customized' DA research context for X-Worlds but i really dunno how i will ever manage what must be done to do a similar (or variable enough to call them reasonably stable!) task for CoSH in TA.
I sooooo wish SD staff could provide us with a truly compatible Tech Editor for DA structural elements, serious dissapointment when i realized THAT the editing powerhouse tool(s) were all made for TA only.
Typos are much harder to detect in a "notepad style" workflow than in a dedicated interface.