Hi Peter, fascinating as ever, I do like reading your technical posts especially as its your profession and I'm just an enthusiastic ametur and enjoy learning as much as possible.

Could you tell me, the Spax adjustables I have say " filled with Krypton gas" on them. Are these mono tube or twin tube?

I expect they are better than the oil filled standard fair.

According to the Spax web site they are their premier damper, excepting for their premium custom alloy jobs of course.