I too own an Ultimate Sorter Model 4, just over a month old now.
Sorted out 9 buckets in 1 day.
As long as the cases aren't lodged together, there is a good chance they'll be separated in the hopper or down the tray. A 9 may miss its slot & end up in the 40 but as advertised the machine is not 100% perfect. You'll have to run the larger case bins a second time for better accuracy. I really don't see this a problem as the sorter can sort 1 entire bin in less than 5 minutes..... It's really fast.
I sure don't miss the sore back, knees & hands from the old ways of the sorting trays....