Frank,
1. I don't have the Grizzly saw, but I do have a 5 HP Unisaw.

2. Even if it doesn't come with a table to go between the rails, it's
fairly easy to make one. you just laminate some masonite or melamine
over a piece of good 3/4 plywood or MDF with a 1 1/2" skirt around the
perimeter of the bottom.

3. Check