I have a dish where the elevations have been sanded off??? Without that, can I just assume at 0 degrees the LNB arm is level and I can adjust the arm up to my 36 degrees? Thanks in advance!

I had a dish 500 with a Legagcy Twin LNB (BS1D1UP201M) connected to a DP301 receiver. I do not see any switched inline, unless the old owner put them under the house. For the last few months I have been losing service and it would seem to fluctuate with temp. changes. This past weekend the...