I only go to see Tristan if I can as he is a helpful person. as long as the fill is above 270bar when it is cold I am happy, they use a water tank what helps somewhat too.
can you remember him & his dad Gary who sadly passed some years back when they owned field acc's ?.
My rifles are =
PCP: Steyr lg110 hft 2014, HW100 SK ( back up & rainy day rifle )
Springer's: HW77 ( 1980's version ), HW35 KLS.