I was surprised to read the shafts might be different. I have read some additional and I think you are right, it's bunk. Maybe someone has taken a grinder to the rocker to gain clearance for larger springs is what they appeared to be.

When I talked to the Lunati rep he mentioned that the can is known to cause some valve train noise due tot he grind. Maybe I am worried for no reason. I will pull the valve cover tomorrow when I have time and double check the rocker to retainer, valve tip and look for rubbing. I will also check the preload more accurately with a good straightedge. If all looks good I am going to stop worrying and drive it. I definitely feel better knowing I have no metal in the oil.

Thanks for the great advice and input!