Summary

Firstly inspired by weslewis model (he did well and even made a video for the building):
https://www.thingiverse.com/thing:3711163

This is my own version with throws up to 55°

You just need to get:
-M3 bolt
-M3 nut
-2x m3 spacer
-M6 nut (used as weight in the needle)
-clothespin (I had to enlarge the hole with a 3mm drill and and a bit for the two plates)
-Two small wood plates to glue to the clothspin
-1.2mm axle (I got it from an old control cable from a standard plane but you can drill it bigger as you which)
-Two droplets of glue (for the axle and plates)

Building:
Once printed, get the three parts clean and check the holes. It has to be HARD to insert the axle into the gauge needle and to the pin. The frame hole should allow the needle to rotate freely.
Insert the M6 nut in the needle. Do it with the axle aswell with a drop of glue on it before insertion.
Insert the axle into the upper hole of the frame. Should still rotate freely. Insert the little pine on the axle with the spike side touching the frame. (it helps decreasing the friction).
Sand the clothspin and glue the wood plates. Screw everithing together with the two m3 washers around the frame.

Do not hesitate to chat with me if you have any problem.