I thought someone might be interested in my solution to the problem of patching holes from old instruments when you change things out. I recently decided to replace my depth and knot meters with a new style multi-function display. It only needed a 3-1/2" hole and I had two 5-1/2" holes to cover.
The first solution that came to mind was to cut a piece of starboard big enough to cover the old holes and install the new display. I started trying to visualize it and it felt like a rectangle just didn't work with all the lines of the cockpit cowling. I then built a simple sketchup model with the old holes laid out. That allowed me to try some different shapes and sizes. I decided I liked one solution that simply followed the lines of the cowling. Of course then I decided that I needed to make the other side match. I've posted the before and after photos below.

The first solution that came to mind was to cut a piece of starboard big enough to cover the old holes and install the new display. I started trying to visualize it and it felt like a rectangle just didn't work with all the lines of the cockpit cowling. I then built a simple sketchup model with the old holes laid out. That allowed me to try some different shapes and sizes. I decided I liked one solution that simply followed the lines of the cowling. Of course then I decided that I needed to make the other side match. I've posted the before and after photos below.

