Damn, despite my previous post, I can't help myself. I pose the following to controllers working 'upside-down' airspace. Dick maintains that providing separation in C is a distraction from providing separation where the action is - circuit area and rest of the D zone. I'd put it another way. If I only knew about the IFR in overlying E and could unintentionally run them into an unknown VFR, I think I would be in a permanent state of 'cacking my pants' - which would be a whole heap more distracting than knowing where everybody was and keeping them apart. Comments anyone?