As some of you know I am a fan of fixed camera mounts such as the T-bracket, L-bracket, or the Dog-Leg bracket. These names can be searched on the forum if your’e interested. The Dog-Leg bracket needs the most accurate angles for its fabrication, as it is not very adjustable afterwords.
Materials needed for the angle sticks are simple and easy to obtain:
Two large paint stir sticks
Machine screw, two washers, and a wingnut - size whatever you or your neighbor
have on hand. A 1/4" diameter would be the upper size.
A 6" protractor.
The pictures below depict the procedure.
This method will not be as precise, but it will be precise enough. The main advantage is no ladder work is needed.