on my bike... i take the pre-load right off (I'm 90KG) and that just works out fine for 30% sag....
where have you set the damping? I have mine about 9-10 clicks out when solo... (this is the knob on the bottom of the shock you get to it from under the bike)
is there any adjustent on your front?
Not sure about front adjustment. Don't think there is any? Re the pre-load, it was around 4 clicks (of about 10?) on collection. I have since tried it at 0 and also 1-3 clicks. No different. I have not tried the higher settings as I presume that will make it stiffer. Haven't been underneath yet. If there's adjustment there, there is hope!