You are currently receiving 40.5 with a feedhorn &
c band lnb? Switching from that will most likely drop signal not increase it unless your lnb's are about dead. I bought mine because 40.5 is a C band circular sat and it was an inexpensive way to pick up circular c band. If you are not that interested in 40.5 I would keep the current feedhorn configuration and work on alignment of the dish is you are having signal problems.