RE: Flaps or no flaps...that is the question
I just finished my RV-4. I put flaps on mine after talking to another RV owner at my field who had not put flaps on and wished he had.
I have done flapless landings and landings with flaps. They are not 100% necessary but who cares. They look cool as hell.
Having flaps does make it easier to get speed down for landing.