10ft BUD & Openbox S9*, TP Fr - Q
3760 - 75
3780 - 73
3920 - 72
*Openbox Q values are questionable, Just about everything is a 70 and response is very nonlinier. Easy to get 70, takes patience with tuning to get higher. May apply to all boxes of this genre, Sathawk, Solomend, Openbox (Skybox??) SSO for short, (Maybe should be SSSO?)
Might be your BUD isn't tuned up to 'center' its beam at the satellite? With the Openbox, I've found it's best not to tune to peak Q reading, for the above reason, but to tune half way between two lower Q readings. Example: elevation at south satellite, Detune elevation from peak reading to a lower reading (say 60) > Then tune through peak to the same lower reading on the 'other side' counting turns. Then back to center(peak) at half the counted turns.
It's a bit more difficult adjusting azimuth this way, but is do-able if Azimuth is checked on both extremes of the arc.