Unit upgrades.

[Zwirbaum]

Hello there

I have one simple question to the modding guru(s). What would happen if I would mod that one tech upgrades Unit A into Unit B (replaces unit B) and at the same time Unit B into Unit A (replaces unit A).

Would that mean that
1) I'm retarded and that would break everything
2) Unit A,B can no longer be recruited
3) Unit A,B can be recruited
4) Unit A,B can be recruited and Unit A can be retrained at any time to the Unit B, and Unit B could be retrained at any time to the Unit A
5) I'm retarded and real answer is...

Thanks for help

[Zwirbaum]

Ok, I checked it. Not only you can't retrain one unit into another, it also blocks recruitment of both units. My genius idea fell apart.