I have a 96 Catalina 30 MKIII that is already in the water here in Michigan. I am considering a new prop and most sites request the distance from the end of the prop shaft to the bottom of the hull. They require the clearance between the top of the prop and the hull to be 15% of the prop diameter. I did not measure this before I put the boat in the water, and the water temp is only 49 deg. F. (To cold to take a swim and measure it;-))) Does anyone know the distance from hull to end of prop shaft on a C30 MK111 hull?Thanks in advance for the info. (My current prop is 13" dia.)fair windsDave