was FINALLY able to get this bitch off!
This is a video about how to remove a cup concrete grinding wheel from an angle grinder. I was trying to remove the wheel for the first time and it was not easy. I hope this video helps.
I'm using a Dewalt DW840. I'm a programmer, not a tradesman, so this was my first time trying to get the wheel off. Hope this helps many out there, because this is a common problem.
To remove the wheel, when the tool is turned over with spindle lock button facing the floor, you turn counter clockwise.