Dusty, I'm with Dan on this one.I usually just static balance my customers cylinders.If I am in deep where I am removing all the cylinder bars and stars to shrink the cylinder on the seperator end of older N-series,I usually mark the stars and cylinder bars so they can be reinstalled in the same place.Where we run corn and soybeans,with the mods. we do,cylinder speed rarely gets over 500rpm..Hope this helps,Hyper Harvest II.