Darex Drill Doctor 750SP diamond wheel replacement.

Replace the diamond wheel for Darex drill bit sharpener 750SP. Step-by-step instructions on how to remove the existing diamond sharpening wheel. the wheel can be turned upside down to double its life because only half of the wheel is actually grinding on drill bits. A surprise finding was a brass shim which was needed to prevent wobbling of the diamond wheel on the spinning post. I replaced it and it works fine.