Originally Posted by
Maelochs
Really? Sounds a lot like
Whatever. I will keep your system handy and try it. Until i have tested it I cannot say if it is always, sometimes, or never better than some other way. It never hurts to have more tools and methods available.
Yes, my comment does support yours. I personally don't use a square, but was simply observing that it couldn't hurt. You should be able to eyeball it within 5°. At such low angular errors from horizontal and vertical that you might make, the hypotenuse of the very acute right triangle you define is hardly different from the adjacent side that you actually want to measure. Much less than 1%.