August 2nd, 2016
After having serious issues with the elevation drive, I dismantled the BIG RAS Rotor last weekend. A construction to support the dish by keeping it in an upright position has been installed.
After opening the case of the rotor, the failure could easily been seen: The cogwheel does not fit into the worm gear. Instead it slips over it. I hope to find a solution soon.
Update 2016-08-03: SPID offered to check and repair it as a warranty case! So it is on the way to Poland now. TNX to Jacek of SPID Elektronik!