2 hours ago, rotuts said:it was mentioned that one end ( back ? ) of the unit is
hotter than the other ( front ? )
so for something expensive like RB
turn the roast 1/2 way through ?
Yep, that's true. The back is hotter than the front, since that's where the heating unit is, and also presumably loses less heat than the front when you open the door, especially if it's pretty full. They do recommend turning everything halfway through. We did this with the three racks of ribs we smoked. Reversed them from back to front, and also from top to bottom (we left the ones on the middle rack in the middle, but did switch the front/back position).
EDITED TO ADD: I can't speak to the cooking decisions in the videos since I'm a candy maker who doesn't really know anything about actually smoking stuff. Yet. 😁