after experimenting with a standard ku lnb mounted along side a c band lnb for 2 days, i found just as some of the post has said,get a prime focus ku lnb.I was going mainly for 97w and picked up a few transponders,not even close to what is on 97w.They all had good strong quality.But nomatter how i skewed or adjusted my dish that was all i could get.I went to 91w just to see if i could get good signal and picked up all signals but of course you know everything is bell there.So my advice is get a ku prime focus lnb if you want to experiment with ku on a c band dish.