I am using a 90 cm dish now. I am not using a switch, no need , I will use a HH90 rotor for the final set up. I guess I was also not using the sat finder properly , I mean you have to be patient and repeat the process several times by reducing the level and the start again . will post results later if any!!!. I guess after all this , motor install will not be as easy as I thought lol lol lol lol.