YOU GUYS ROCK!!!
I agree with you on the obstacles of kitting. However, I believe if an idea's time has come...you can't stop it. Your concept is valid.
I'm curious, do the inner doors on your P-51's cycle (Per full scale) and what type of engineering went into that?

(Incidentally, for the uninformed, the "A" variant inner doors locked in the up position when finishing cycling and the flaps/inner doors didn't droop from oil pressure drop as they did on all later variants.) Many modellers miss that small, albeit very important, static detail.