I am assuming that:
a) The dish mount is a modified polar mount (since your [elevation] angle is set by a long screw .....nothing better
Correct.
b) your dish is driven by an actuator motor (telescopic motor tube thing)
No.
I don't know what it's called but it doesnt have any sort of tube/piston/pipe pushing the dish.
c) Your dish is an offset dish (the LNB sits below the centre axis of the dish
Correct.
First step would be to confrim that your support pole/tube is truly vertical. Getting this wrong will make all other settings very very difficult.
I just checked it with a spirit level and a plumb line. The fooking thing has shifted
, it is leaning slightly forward (towards south).
Secondly, if the elevation screw is undisturbed, it should not need to be touched.
I fiddled with the elevation screw yesterday
I put it back to it's 'original position' as best i could using the rust markings on the thread, but it's most likely knocked off.
I could have this sorted in no time if i still had my old Pace MSS300 receiver, the way i used to realign it was to tune into a weak Analogue signal @ 1west then fine tune everything, reset the motor to 0 and then everything just fell into place, not very professional but it worked a treat
2 months ago the wife was having a clearout and she binned my old analogue machine AND my signal strength meter, i even gave her permission to do it as i thought i'd never use them again.
All I've got to find satellites now is a Dreambox running the Satfind 3 plugin, as far as i can tell it's utter garbage, even with the dish unplugged it reports 60% signal strength with 75% AGC and a BER of billions!, lol