Steve, Firstly Sir congrats on a lovely clean car, Breaks my heart when I see them grease laden and filthy!
I too can give a thumbs up for Cains shocks. When I needed to change mine I knew he had been developing them and had been holding off but my rears were next to useless so I bought some adjustable spax options and as I had a set of standard Bilsteins on the shelf I fitted them. When a pal later needed new shocks I told him to go with Cain and I fitted them with him... he won't mind me saying he has two left hands! Are they better than my fit...... you bet, worlds apart. Yes I have never been an oficionado of front shocks on a classic, I have talked in depth on the matter before, But the rear end is important. Most adjustable shocks for a mog on the back end seem to have an harshness about them which increases far more than the effect of increasing the damping quality as you move up the scale to get the damping level as you'd like it. Cain's do not suffer with this. as you move through the scale you don't seem to lose the comfort effect yet the ride stiffens in a way that limits the travel. I'm probably now going to be looking for a reason to swap mine out which of course is ridiculous but I'll bet I end up fitting the rear shock's as that little devil is already chirping in my ear!