Hi all a friend is in the process of putting together a Prather 31'' fiberglass deep vee hull intended for .21 nitro power. The boat and hardware weight 42 oz for motor AQ UL-1 2030 KV 120 amp esc for lipo's 2-2s 5000 mah in series . This hull would be 1985 -1990 vintage with the prop shaft exiting through the bottom of the hull for subsurface drive set-up. ?1 has any one set-up this hull for 4s B/L power.Would using subsurface drive be the right setup? What diameter props would be recomended for this setup ? Any other set up info would be greatly appreciated . Regards Andris Golts.