I downloaded the rear controller component here:
It is part of this very large but very good build, sadly too large for my print bed:
I screwed the controller mount into a plastic dvd case, with a piece of wood as a spacer.
I then covered it in a nice layer of duct (duck? Who cares?) tape around a bit of bubble wrap to ensure my killing sprees are at least comfortable.
Bob's yer Mother's Brother
Playing in Onward shortly... Who is with me?