I have been slowly working on building a cutter grinder for sharpening endmills. It will sharpen the ends and the flutes. The spindle rides on an air bearing that has nearly zero friction. I need to add stops to adjust the tilt angle for grinding the relief angles on the side of the flutes and mount it to the bench grinder with adjustment to grind the relief angles on the end of the flutes. It also needs a finger to follow the flutes when grinding the sides.