I have one of the Delta variable speed grinders (GR-450) that's been lightly used for maybe 3 years or so and it's only used to sharpen lathe tools. Recently swapped out the AO wheels for 2 CBN. Today I swapped out the Wolverine platform with one of Robo Hippy's adjustable rests. Sharpened 5 or 6 different scrapper and life was good. Switched over to the 180 grit side to do a bowl gouge and the grinder light flickered a couple times and then went out completely and the grinder won't even turn on now. Circuit is good, no smoke, no puff just all of the sudden died. I know the CBN wheels are a lot heavier but this unit hasn't seen that much use. Don't see any type of reset button. Dread having to deal with Delta CS but anyone else have any motor issues after installing CBN wheels?