The compression side as twice the oil to meter,so that side can be set with less "needle" screwed in, try 2-3 turns out.
If you find the forks are un-willing to soften on compression with the compression adjuster screwed three turn's out this can suggest the forks are stiff due to some other reason.
Slightly twisted assembly,or worn sliders/bush's will produce a "Harsh" feeling .
Adrian Dedman from EKK racing,who is a successful Commando sidecar racer,found my kit "choppy" and no amount of Damper "twiddling" would ease this, I re-sleeved h is fork sliders and made up some new plastic bush's, Only then did the New assembly became smooth ,
I have found over the years that the lansdowne kit will make poor fork action Worst,and good forks much BETTER!
It is difficult to see internal slider wear,and can be quite bad, after all the sliders can be over 40 years old.
I think fork oil changing was never "top" of the maintenance list, and how many owners after a spill checked the forks for trueness afterwards?
I have never rated the norton design, the fork assembly as no ridgidity, Grip the front wheel between your Knee's and twist the bars for-aft,you will see the whole assembly twist, On hard braking single sided "big" disc's will twist the wheel out of alignment untill the tire rub's the fender!...But dont worry about it your brain makes auto adjustment to this condition :roll: hopefully :!: