I go with as short as nipples as possible (@1"-1.5"). I now use long bolts (4.5-5") double nutted to space fire basket off bottom. If you don't have a pan in the bottom you will have to work around those long nipples to scoop the ash out. You can dump the ash out but after the first time it sticks to all grease build up on the sides you will probably change your mind. Don't do the "Trash Man Slam" or you will oval out the top like I did and lid wont fit as nice.
Make a Thirdeye Hoe scoop