CSW! It is interesting you say you don't want to pursue MMA but you are talking about mixing your martial arts. :) Maybe you mean you don't want to fight in a cage for money?
Note that the gold reflector will shift the colour temperature of everything it hits, so if you're photographing a model wearing white, and that white has to look white in the final picture, you're just going to have to put things back the way they were in post anyway
Principles of Operation. The autocollimator projects a beam of collimated light. An external reflector reflects all or part of the beam back into the instrument where the beam is focused and detected by a photodetector. The autocollimator measures the deviation between the emitted beam and the reflected beam.