simono wrote:Good info, really apreciated.

The NXA is coming apart this weekend for these checks ... done 200mls on new HRC everything with Oulton on the 19th Sept looming large ..

Thank you for your advice ... learning is good

Simon, did you not get the HRC NXA manual when you bought your RS?
If not, you need to get one as it will tell you all (well almost all!) you need to know about looking after your NXA.