Just finished installing the Channel Master kit sent by DirecTV. The instructions are very thorough and suggest the difficulty in threading the "Sat C" coax lead through the LNB support tube with the other 4 cables already in place. They further suggest using a coat hanger taped to the lead which I did. What I found that helped ease the coax insertion was to remove the outer LNB support screw and then replace it after the cable was pulled through. Hope this helps.