Replacing the center pins of the action requires precise equipment, especially reamers which must be straight and not tapered like many use. Experience is necessary. Uniformity is an essential requirement. No lubricant!!!!! The "taster" (as the measuring tool is called) is a great help, but it can only detect the coefficient of friction, not say if the replacement was done well. Manual dexterity and experience are required, which even many technicians do not have. What may result in being correct now may have a short lifespan. One must also see the condition of the gaskets of the lever holes and decide which pin size to use compared to that of the replaced pin
