Re: Slotted poles vs hex poles
Suppose one screw type makes the magnetic field below the string more diffused, so that it evenly magnetizes seven millimeters of strign width above the pickup instead of five millimeters, or changes the "aperture" by that little bit. The only known consequence of aperture width is comb filtering, so the question reduces to, what's the difference in comb filtering between five and seven millimeters? Nothing you can hear, as only very, very high frequencies are physically that narrow.
The mass shift changes tone as you are moving the field on x axis right under the string, the reson why polepice top part mass affects tone is the same as to why distance from top of the pole to bottom of the string affects tone, but in a slightlier way.
Suppose one screw type makes the magnetic field below the string more diffused, so that it evenly magnetizes seven millimeters of strign width above the pickup instead of five millimeters, or changes the "aperture" by that little bit. The only known consequence of aperture width is comb filtering, so the question reduces to, what's the difference in comb filtering between five and seven millimeters? Nothing you can hear, as only very, very high frequencies are physically that narrow.