We cook commercially (weekend warrior Food Truck-ish) on a MMOF. Love it. Built like a tank, and super efficient. TRS has you covered on the MMIF details. That model came out about a year or so after my partner picked up our MM.
Bill is a helluva nice guy, and a very successful Dentist to boot!
We burn GFS bagged RO lump, and use some hickory chunks for extra smoke flavor.