I'm trying to make pepper mills similar to the one in the craft supply usa instruction sheet using a shaftless crushgrind mechanism. https://www.woodturnerscatalog.com/p/53/5242/CrushGrind-Click-In-Mill-Mechanism Mine is different in that the top and the bottom flow together in one line. Everything was lined up great until I started putting the finish on and I suspect the wood moved. Now the two pieces don't line up anymore all the way around the mill. I guess that's why a bead or some other detail at the junction of those two parts is used, to cover up any wood movement?