Sorry, I see you told me the arm is slightly smaller than 1/4" d... which probably makes it 6mm. My brother was bothering me about my arm being too thin (6mm) so I ordered 7mm carbon fiber rods. Probably should have left well enough alone...
Can you tell me how far behind the center of the pivot do the wires exit the arm? Does your arm shaft slide in the ball cap to allow you to position the cartridge on a Well Tempered protractor? With the cartridge mount fixed in position on the arm with no slot to make fine adjustments back and forth, I would think the arm moves a bit back and forth in the ball cap to make fine adjustments. Does your cartridge mount rotate from a screw fixing it to the arm from beneath it? I'll make mine mount with a screw down thru the rod from he top.
Can you tell me how far behind the center of the pivot do the wires exit the arm? Does your arm shaft slide in the ball cap to allow you to position the cartridge on a Well Tempered protractor? With the cartridge mount fixed in position on the arm with no slot to make fine adjustments back and forth, I would think the arm moves a bit back and forth in the ball cap to make fine adjustments. Does your cartridge mount rotate from a screw fixing it to the arm from beneath it? I'll make mine mount with a screw down thru the rod from he top.