I could sort, grade and charge more for “perfect” assemblies, but I don’t. 5% is the industry standard. Maybe I’ll think about it. The list of questions I have already for clients is pretty long since I carry so many diamonds and cantilevers.
Since I have a source of ruby and sapphire rods the proper diameter, I make my own assemblies. If I could find a source of boron rods, I’d make my own boron assemblies too, I think. Except maybe for Ogura assemblies where the original OEM Vital diamond fit into the slot and with the tiny steel mounting plate would be preferred, which would be the choice of most people, I think, especially for Koetsu and Dynavector.