I have a 10 ft mesh dish with a center lnb support that i can adjust in or out. I have geosat lnbf mounted, so when I got the dish i just mounted the lnbf on the existing mounting distance and had to move lnb in ( was about 3" sticking out from scalar ring). I thought since the lnb should stick out about 1/4" then I could move the support in and move the lnb back to get my 1/4" sticking out from scalar and I would get a much better signal. It didnt work so then I did my calculations and got a f/d of 48" but still not a good sig. Any suggestions on distance of scalar ring and why I got my better signals with the lnb sticking out 3 to 4 inches in front of the scalar? Also any suggestions on the best lnb without a servo?