737 Duct pressure gauge

The 737 Duct pressure gauge has 2 hands. Obvious we will need 2 servo’s to drive the hands.
Servo’s only turn 180 degrees but the indicator scale is about 270 degrees. So we will need some gears with a 180/270 ratio. (18 on 12 gear teeth)

I made the entire mechanics of the gauge with my 3d printer.
I used these cheap small SG90 servo’s.
There are several parts to print
I designed all this using SketchUp.

Pictures say more than words. The drawing shows most of the elements.
The brown c