Bought this last Wednesday and went to install Friday evening.  Had old disposal removed then realized I needed to remove the drain also to have the rubber shield.  Got the old one removed then got to the point in the instructions that called for plumbers putty.  I didn't have any so had to be without the kitchen sink till the next day when I could get some.  Box said everything was included other than basic tools.  Also hope it never stalls since there doesn't appear to be a way to manually free it.