I have experience for cartridge re-tipping. The tip of my Micro Benz was coming off from the linkage. I sent it back to Micro Benz Factory, retip and calibrated for me. Price was reasonable. Now another cartridge has the same problem. It is a Koetsu Black Goldline. Does any member can source for me any reliable smith can do the retipping work for my Koetsu cartridge for me.