For example, raising the AV plate one inch for every..what is it?..12" of placement of the motor aft. At displacement speeds it is not germane. Best of luck! Photos of you out having fun are always appreciated. Have you tried a peek at TSBB? You'll find plenty of support and amusement there.
http://bbs.trailersailor.com/forums/trailersailor/index.cgi/#729617