Fully loaded, thats me, the Missus, Full Panniers, Full Top Box and Tank Bag I have the Pre-load a couple of turns back (anti-clockwise) from maximum and the Damping Screw 1 turn back from the "stop". That works for us with our Tourances at 36/42. (never touched the front)

never touched the front
Damping Screw 1 turn back from the "stop".

) and the rear preload set around medium. i don't take much when "fully loaded" anyway, probably 15 kilos at most, and with my G/F on the back I only turn it up one or two clicks again. If you are happy with the settings riding normally, try it two up as is, then wind it up a notch at a time if it feels as though it is wallowing too much.