Can anyone give me some insight on this please. If you try putting a head on a drum and it doesn't sit quite right, you kind of have to snap it on and once you do it is TIGHT...does this mean the shell is slightly out of round? Or are some shells slightly oversized? You could also tilt or rock the head on the shell once it was on. The drum I encountered this with was a Gretsch Broadkaster series snare. I've noticed other imperfections on this kit as well, so I'm becoming dubious of Gretch quality control. I'm not sure if this is just me.