How to Make Units that Upgrade

Trying to have one unit upgrade to another, like how Cybran shields and Engineering stations work.

Instead, the T1 unit builds the T2 unit around it. At the end of the process, both units remain with the T1 unit inside the T2 unit.

Can you have the T1 unit self-destruct at the end of the process?

You probably want the T1 unit to leave no reclaim behind

And it would be nice if you could transfer or copy orders from the T1 unit into the T2 unit