I bought one of these kits to fit to my mini (with a cg13de) the first one I got had heaps of slop in the ball and socket after a small metal packer fell out, so much so I didn't use it, the seller sent another, this one had no packer but the same amount of slop.
After a while I decided to modify it, turns out the socket part is acrylic and by filing a mm or so out to close the socket closer round the ball it fits with no movement. I then had to insure a tight fit back in the housing so I wrapped the outside of the socket in ptfe tape I had lying around and put the circlips back on.
I had 2 of these at this point and whilst reassembling it broke in another spot so I had to use the 2nd shifter. So fair to say even though I got it working I was not impressed with the quality of this short shifter, it looks exactly like the one shown here but who knows might have been a second or a cheap copy.
Just letting people know and also sharing a fix.