Why do you need a CS prop on an RV7 anyway? A fixed pitch Sensenich, tweaked out to 87 inches will be just as fast, and a heap cheaper and less costly to maintain. You seriously don't need a CS prop on an RV because their takeoff performance is great with FP.
I've flown every make & model of RV except the 12, and just can't see any justification in CS props. Save your money and revamp your avionics instead.
PM me if you like.
happy days,