Over on Wings of War Aerodrome someone brought at their group plays that collisions only happen if the center post of a plane is overlapped by the base of another plane.
This means that bases can overlap, so long as the center post of either plane does not "enter" into base of the other, there is no collision.
What do you guys think of that?
I kind of like it as it gets rid of all of the "what altitude are you at?" questions (at least the part were we all have to look and verify how many climb counters we have). It also means we don't all have to do the "mandatory" climbs to get some separation between our wingmen.