Adding units to group existing in mission / simulate "repair"

Currently I am thinking you have to call the destroy function and then respawn the group with the added unit.

Is there an easier way to add a unit, to an existing group, that was killed / destroyed back into that group to simulate a repair?

Thanks in advance.

Yea, you could take their info and bung it into a table, add the units back that you want, and then spawn again. Simulate them going into a building or something.