It's funny, I called
Masterbuilt about ordering different rack brackets and they were less than helpful. I have the basic MES30 which has space for 4 racks. The Sportsman's Elite model is identical to mine with the exception that it can accomodate up to 6 racks. So I called them and tried to order the rack holder brackets and was told they wouldn't fit my model and they would be useless. Basically she was trying to talk me out of the sale and it was becoming almost awkward.
I had already measured the racks and placement in the smoker and both models were identical other than the rack capacity. They really didn't want to sell me those rack brackets for some reason. Eventually she agreed to sell them to me but on the condition that I can't return them. It was very weird. She wasn't hostile but more like aggrivated I would try to circumvent their design scheme to get more money by buying a whole new smoker than just change out the racks.
I could be wrong with all of my measurements and such but she didn't come off like she was warning me politely about the difference between the two. It was llike she was disgusted or something. It was a very weird call.