Upgrade kit service for Bosch Gen4 spindle

We provide for you the service of install the upgrade kit for Bosch Gen4 spindle. 

This upgrade reduce crankshaft play, prevents water ingress which results in corrosion damage to the crankshaft bearing surface, and stops premature failure of the crankshaft support bushes... and prevents internal damage to the printed circuit board (PCB) and all other components. The "double-sealed" left-hand crankshaft bearing prevents water ingress into or through this bearing.