Hello. I'm having troubles when trying to intonate my Eastwood EUB-1. I do this by tuning the pressed note to octave harmonic on each string (at the position of the 12th fret), but pressed notes remain sharp, now matter how far I move bridge saddles from the nut. I got pretty close on E and A but at the cost of compressing the saddle springs completely and getting a pronounced buzz in the lower register of the neck. Raising the action helped, but fatter strings deformed on the saddles to the degree of exposed cores (which in turn didn't help the tone). Do I have some other options, or it is better to leave it at initial state? I've just got a fresh set of flat-wound strings and don't want to screw it. My guess is that the nut action is higher than it should be, and pressing the octave deforms and stretches a string too much, resulting in sharp note. Is my theory plausible? Thanks.