As you both say, I really do love how pork butts come out in my modified MES40 with the
AMNPS pellet burner for smoke.
The flavor and cook are excellent and it really is nice to be able to run it with very little intervention for long periods. Perfect, especially for those long long smokes like a butt!
If the auger and pellet movement are smooth, it seems like setting up a different control system might be able to fix the issues with the PB. That still seems like a fun project for a control system nerd like me.
But it's not acceptable out of the box performance for a product. I can see why you'd be mightily annoyed!