Originally Posted by Andrius
It cannot be undone and the points cannot be transferred in any way that would be worth it.
Generally, the decision on the scheme depends on your flying pattern. There are no general rules.
Yeah, I second this. It`s an individual decision based on the classes and metal you fly. If you're just wanna have status AC and BD are quite okay but...
Have a look at BlondeBomber's comparision chart in the *A Useful Reference Links sticky.
Cheers