Now don't go moving the goal posts, Joe...
My point was simple...the relative success of the two F2000 series is far more complex than just whether they were club legal. Besides, starting this year IIRC they have dropped the club-spec cars and everyone has to run the DP-08 Mazda, right? In the pro-FB series it is merely the engine prep level that's not club legal...not the entire engine, as with the Mazda. Converting from one to the other is no more than a routine engine swap.
Wren, up above (or maybe in another thread recently) you made the point that the current club FB engine rules are unenforceable (which I and just about everyone else agrees is correct). How do you reconcile that with wanting the pro series to use the club rules?