I'm late to this thread, but I get amazing Ku reception on my 10' KTI.
The factors I dealt with are: PLL Ku LNB in the dual polorotor, adjusting the LNBF in or out of the ring, skewing the polorotor and the final piece was the elevation actuator I put in 2 years ago. It also really helps that I have a pro meter - the Applied Instruments S2.
I found that my elevation/declination even out by a small bit was a giant factor in Ku. I don't adjust it anymore, though I can with a button press, I just found it was easy to peak it at both ends of the arc and figure out where the problem was in either elevation, declination, or a mix of both - without a lot of wrenching back and forth.
I attached a drinking straw to the back of the elevation actuator, then peaked one side of the arc and drew a black marker line where the straw lined up next to a bolt head. Then swung the dish to the opposite end of the arc, peaked that side and marked the straw. There was a noticable gap between the marked lines. I then adjusted the declination and swung it to the other side or to my due south and peaked with elevation, marked the straw - were the lines further or closer?? More declination and elevation adjustments and progressively, the lines on the straw got closer and closer until the same line was the peak for all positions.
My big dish exceeds my 1.2 offset for Ku since I did this.