Any pics of the filing you had to do with the SE part? I was not aware that would be needed. This is a planned mod for my Limited when it finally arrives.

shows a pic by gs34 of grinding area. Just cutting back a little on the ridge or flash of the inner primary as stated above and does not effect the gasket seal area. A Rotary file 1/2 inch by 7/8 inch long fits in a 1/4 inch drill on very low speed worked very well for me. Bought at ACE hardware, ~ $6.
Self Help Tips -> Transmission, Clutch and Primary -> #23 Compensator Kit
There’s an excellent write up by gs34, with pix: Compensator Kit - Harley Davidson Community