I am at the stage of building that I need to order a prop shortly. I am building (slowly) a rv9a. I have 173 hp io 320 to bolt it to. 10:1 compression and electronic ignition. For crankshaft life I have been advised either wood or composite only. I have a hollow crank and a governor. What are your thoughts on the new Whirlwind compressed hrt style prop for lesser hp? Or should I go for the proven rv200?