Built the gear boxes. I was a little nervous about building them but they were very simple. These modern match hole kits are great! Be carefull to leave the rivet holes open in places noted on the plans. I had to drill one rivet on each gear box later when i noticed the mid cabin braces will be riveted to the gear boxes in these locations. Im not sure if i missed a note in the plans or not but its fourth rivet up on the aft, inboard rivet line.