The main landing gear get two micro switches. One the sense the gear down and locked, the other to sense the gear is fully retracted.

The down and locked switch was easy. Just drill a couple holes in the tab. I did have to make a spacer to move the switch out so it would contact the over-center latch.  When the gear is fully extended, the latch comes down, locks the main landing gear in place and depresses the micro switch.

The gear up switch was a bit more work. Once again, I had to make a bracket.  But fortunately, it was just a straight piece of 1/16″ stock. Once the switch was mounted on the bracket, I retracted the gear, positioned the switch, clamped it in place, drilled and tapped the holes in the over-center link and then mounted the bracket.

The yellow stuff in the screw heads is Torque Seal. Also known as “anti-sabotage fluid”. Whenever I install something that is torqued, locked or is not coming off again, I put some torque seal on it. That way I know it’s done.