RS Rev RLT pop Lock -ve pressure?

ljs1977 Posts: 247
edited April 2011 in MTB workshop & tech
Just got my new bike. Got it initially set up by Sherwood Pines and everything was ace.

Now it has all settled in I have checked the sag on the front and rear and re - set this. Rebound is fine. But not sure about the -ve pressure on the RS.

Is there a rule of thumb or should I just leave it as is if it is not bottoming out?