One question regarding the 13' prop; my aperture is 13.5," which leads me to believe I can only use a 12" prop to allow the necessary clearance. Do other A 30's have more room? I'm currently swinging a 12x12, but would like to go larger, as I have a Yanmar 3GM30, and feel I am underpropped. Thanks, Joe #286 One Love 1112009604.0