Would an RV (was considering an RV7, but assume a tandem RV8 would be "better") or Harmon Rocket, with inverted oil / fuel, be competitive in advanced aerobatic competition? If a stock version of the kit would not be competitive, are there things one could realistically do during construction to make an RV more competitive? (such as to modify airframe to take a larger engine, beef up structure, etc). Would expect to talk to an engineer to make safe changes, if this is even feasible.Or would this be wasted time and money - better to buy/ build a dedicated aerobatic aircraft?Thank you,AMS