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Your razor could also have a "bend"... not warped... just a bend at the tang. Not large enough to be easily seen but enough to cause the tang to rub one of the scales. if this is the case... well you...

Usually it’s caused by a warped scale or a bent pivot pin. But that doesn't seem to be the case because you have new scales and a good pin job.
Assuming the scales/pinning job/pin washers ect… are...