I can see why they have problems with ID tolerances in carbon shafts due to the manufacturing process. I don' t like it, but I understand it. Sloppy insert sizing though... that is nothing less than incompetence. That is my opinion as a retired aerospace machinist and QC inspector. The semi-trained monkey (uh... machine operator) should have go/no-go gauges in his hand and be checking every 5th part coming off that machine.