As far as the tightening of drag with the lugs on I had the same issue with my 68 gmc, took the die grinder with pad to the outer edge of shoes and just smoothed the edge of lining a bit and issue went away seems when they turned the drums a small taper was left near the were the face and shoe run meet( or the azone shoes were a little off) fixed that issue for me previously I had always smoothed the leading and trailing edge on my brake shoes a bit,,, use to come that way but not anymore..