I recently purchased a Raymarine ST40 Knot Meter with a through-hull transducerthat I wish to install on my H260 (hate to see them go). I would like to do theinstallation myself, but don't want to wreck the "Commander" in the process. Hasanyone had any experience with this type of installation. I know ballast tanks andthe fresh water tank must be avoided, and access to the hull through the cabin maybe difficult. Any help/tips would be immensely appreciated. Tom