So I need to scrape the paint off my basement floor so I need a diamond grinding wheel, a good angle grinder and a feather duster. Of course, Dewalt offers everything. However, when these items arrive, the 4" diamond cup recommended for this angle grinder appears to be fairly flat, although I'm pretty sure it's the standard size. After a few manipulations, the dust cover is put on the angle grinder, but for some inexplicable reason it does not reach the last 1/4 inch of the tool. The end result