I'd take my 80cm down but I haven't a clue how to get it back up there tracking the arc accurately
.
Before you do anything, can you,
very carefully, scribe thin marks across the dish mount and the adjacent part of the mounting pole to clearly show that the two are correctly aligned in that position - and then
carefully remove the complete dish and dish mount as one unit
without disturbing the bolts (etc.) between the two.
When you refit the dish mount and dish, realign the marks on the mount and on the mounting pole - and the dish should now be pointing in exactly the direction as it was before you took the stuff off the pole!
ALSO, before you remove the dish, it might help a lot to fit a car exhaust clamp around the pole immediately under the dish mount to stop the latter dropping when you loosen/tighten the mounting clamps, and thus making it easier to align the scribed marks when you refit the dish