Hi Ron
I have a question, why are you using Christolube on the DSV body.
I find this stuff to be truly crap and after a couple of months it goes hard crusty making the DSV stick and ever harder to turn.
Would it not be better to use Silicon Grease for this part of the service ?
Cheers
Chriso

The main reason for not using silicone is to prevent cross contamination with oxygen service parts. I have never had any trouble with christolube except it needs re-lubing every once in a while.