Well, that was an experience.
It was going so well, I fitted one side and everything was good in the world.
Then removed the other old shock, cleaned everything up and put the new shock in place, turned both nuts onto the threads by hand and start to tighten them. The top goes fine, but the bottom started to go tight. I held the tube with my hand and try to tighten but it just turned the tube.
Removed the shock and the thread is starting to strip off the bar
So I try holding it with grips, to see how far I can get the nut on and the threads literally dissolve.
I have fitted many parts in my time and never seen this.
Have had to order another one.
On the plus side, the new shock feels much better..no bounce