Air Staging requires energy to repair aircraft with no cost on mass.
If you stall energy, air staging does not repair your aircraft.
Why can't the same be true for other types of repairs? A heavy(ier) cost with energy but with little to no cost in mass with repairing?
Obvious exceptions would be with experimentals and maybe economical buildings, but using a lot of E to repair structures like factories and standard units should be okay like so.
This could also give energy a tad bit more utility since it already tends to be overflowed when repairs matter most.
Yes, repairing should cost mass, too, but maybe not as much as it currently does.
Repair time is on a similar story, as it should definitely be shortened, too. Makes certain repairs like ACUs kind of awkward.
Now, I'm not saying you should make ACU repairing absurd, either - just a little faster.
At the moment, does repairing an ACU even help? 100 Hives seem to make no difference whilst still drawing resources.