Since Grand Rapids Technologies added a second AHRS as a standard option on their dual-screen EFIS system, I found out that I'll be getting a second magnetometer as well. This necessitated a slight mod to the shelf in the aft fuselage where the units go. I removed the two centerline-mounted nutplates and installed four new ones. The units will be spread apart about six inches. I also used non-ferrous, aluminum nutplates this time, since I've learned that even a tiny steel nutplate can have a slight impact on the accuracy of the magnetometers.
I found out the fate of my missing throttle lever. It apparently fell off its hook while it was being anodized, and ended up down at the bottom of the anodizing vat. The people doing the work didn't realize what had happened -- and when they did, the part had been almost completely dissolved. So I'll have to make or buy another lever.
Aluminum nutplates and brass screws on the left are ready to mount the second magnetometer.
