NewCheat sheets & tools
Failsafe Test Sticker
Four steps on the bench. Do it before the quad flies away.

Details
Hold the quad side-on against the sticker with the bottom plate on the base line, then read the camera’s angle against the fan. A line every 5 degrees, numbers every 10.
Drawn as exact geometry, so the angles are right at every size; the bigger sizes are just easier to read. Handy after a crash has knocked the camera, or when you copy a friend’s uptilt.
A plain black and white protractor. Stick it on your toolbox lid or bench.
Check the quality of my sticker article here.