Did it
I've installed a Hummingbird (300 something?) model with the speed/temp display. I installed the depth transducer by gluing it with some silicone in the lazarette under the cockpit. I didn't like the idea of drilling holes in the bottom either, so I mounted the speed transducer UNDER the boat. I made a little "fairing" out of styrofoam core and fiberglass and epoxied it to the bottom. I then screwed the transducer to it. Seems to work OK. It doesn't agree with the GPS all the time, but then again, you've got to figure the GPS can be off as much as 1-2 knots, so I'm not sure which one is more accurate....I installed the display unit on the back part of the tiller. That part of the installation I'm not very happy with though. It works OK, but when you're in shallow water, having to constantly glance back at the display isn't very convenient. Last time, I've had my daughter read off the depth numbers to me and that worked great! <G>Good Luck!Chrisckluczkowski@ato.comS/V Doghouse