Every aircraft owner has a different preference for the dashboard
layout, even though we use a standard layout design. It is important to
have the longer instruments like the altimeter etc... in the middle
otherwise at full lock you feet may touch the back of the gauges, keep
the smaller gauges where your feet go.
We cover the whole dash in tape, this does a couple of things...
1. Stops the dash from getting scratched when mounting the instruments
2. By using the tape you can mark out the dash on the surface by using a
texta or marker pen to make sure everything is going to fit where you
wanted it to go.
Another benefit of using tape is it helps the fiberglass and gel coat
from splintering when drilling the holes. I would only ever recommend
the use of a proper hole saw for drilling, the ones with an adjustable
arm will do the job but if they slip you have ruined your dash and i
find they leave a VERY rough hole.
Thanks Michael - X-Air Australia