I know this probably sounds a bit stupid but i would just like to know what the blue knob at the end of the reserver does and how to adjust it as im new to DH and like to fiddle with stuff
cheers, will
It controls bottom out as it says, winding it in (clockwise) makes the air volume in the piggy back smaller so it ramps up (becomes harder) towards the end of the travel.
Adjusting the air pressure has a similar effect so check the air pressure first, it usually has the recommended pressure range on the shock somewhere. Rule of thumb is usually higher pressure for smaller volumes (blue knob wound in) and lower pressures for bigger volumes (blue knob wound out)
You can adjust it with a 4mm allen key, it will be harder to turn with higher pressures in there so if it's too hard to turn let a bit of pressure out.