Hi, a3nige,
Sky sport 6 to convert the stick to self center is finicky but very easy if you have the correct kit then on the 'arm' at the thick end there is a small pin (all part of the arm)
This in turn will locate into a grove that is to the bottom of the "pot" and over to the side , the spring will fit onto the small hook like end of the arm and locate on the slide part of the tension adjuster which fits via the screw,
It will be an exact replica of the other stick so study that to familiarise yourself before you start.
I converted capt jacks trany a short while ago.
Richard,