The plane I am buing requires a smaller prop. Can I use a 12x8 prop on the TT91 four stroke to reduce the prop diameter distance to the ground. I heard garman makes one but master airscrew only makes a 12x6. Would the 12x8 be good for a Cessna and the 12x6 be good for a P51D. Also what size 3-blade
spinner would I get for this size prop a 21/2" or 3". And what size sapinner would I get for my present 14x6 2-blade prop.