Shift Kit

I removed the check balls prior to taking the pictures so there aren't any in the pics, but I may well have installed them wrong in the first place.

Book arrived today and it's already looking like it'll be a big help.

Any help and anything to go on is much appreciated!

I'm going to disassemble, clean it with M.E.K. and put it back together more carefully this time and hopefully it all goes well.