Three speed crash box

[Colin D Smith]

Thanks for the information chaps..
The gearbox on my car is the older type gate-change lever.
With the grear stick in my hand, how does one take it apart! I can drill the rivets out of the reverse lift up rod thing, but that would only get me so far as the aluminium  knob looks like its riveted to the stick. I have no idea how the ball is fixed on the selector end. I don't fancy cutting the gear lever in half just to make  the repair..