I am getting different pitch ranges when the blades are perpendicular vs parallel with the boom. Not sure if I am doing this right.
I've seen that as well. Different +/- pitch range numbers if pitch gauge is on blade front, back, left or right. Though usually less than 0.5°.
I guess that could be down to your checking method, gauge quality, manufacturing or build tolerences.
Small variations shouldn't be a problem. But if you're not confident maybe try to find local help from an experienced/competent heli builder to check your setup?
Edit: Don't mean you're not a competent builder, just if you look for assistance try to find someone who you can trust knows their stuff.
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