Alright, I'm having trouble making a Halo arena map. Here's the deal. I have an ability named "Operate Turret" for MC and it works. The turret is "mind controlled" and MC is paused. On the turret, I have an ability named "Unoperate turret" and the target is Master Chief. The thing is MC doesn't unpause and you still own the turret. I coded it with triggers, but it ain't working! Email me if you want my .w3x file.
I don't know if this helps, but maybe set the units as variables? That way you can use seperate triggers for operating the turret and to stop operating the turret. If you don't know how, you could always send it to me, my email is [email protected].
Use loading / unloading, but make the turret asimilate health with the master chief boarding it. Then when the turret dies, you kill the person who boarded it, and res the turret, and at a certain amount of deaths the turret is destroyed?