Ordered a second instrument panel. because I was not happy with the first ones holes cut. This time I secured the efis mounts securly, then drilled them int place. Then I cut a rough hole in the front. THen I took my router, and trimmed the holes to the size of the mount. This way worked ery smooth. Drilled the hole for the compass. Drilled the hole for the ignition. Mounted ahd drilled the holes for the throttle, switch quadrent.