I have an older non-RF offset. Hotspots, uneven smoke sometimes, etc. On my Lang RF; none of the above. If I want a variation front to back on temps, all I do is lower the front a tad. Dead even or ever-so-slightly higher on front an the temps are almost exactly the same front to back.
Hance - Lake Dogs Cooking Team - MiM/MBN/GBA CBJ and comp cook
Lake Sinclair, GA (strategically about an hour from everywhere)