I'm currently in the process of building my first UDS and i'm at the stage of deciding the height of the grates. So far I have 1" clearance under the ash pan which is 1 1/2" under the charcoal basket. With that setup, I end up with 32" from the top of the barrel to the bottom of the basket. I really want to have 2 grates to be able to cook a lot of ribs but I've read on this forum that I cannot go below 24" between the bottom of the basket and the lowest grate. If I follow this rule I end up with only 8" to the top of the barrel to put 2 grates. With that in mind, I was wondering what you guys would recommend for grate heights. Is it a profanity to have less than 24"? I was planning to had a diffuser plate as well. Thanks in advance!