Had an order from AC Spruce arrive yesterday. It included some hinge material for the landing gear doors, some steel for the landing gear forks and some 1/2" diameter aluminum rod. I turned this rod down to 12 mm diameter studs for the spar attach plate.
I had made some studs previously but I wasn't happy with the tracking on the die when I cut the threads. After learning a new technique using the lathe to hold the die square to the stud, I was able to make some new ones. See attached pictures. Much better.