This morning I adjusted the clutch biting point on my NC.
I can confirm that although it looks it pretty inaccessible area to get into its not that difficult once you try. open the door all the way and rest your back on the door rail and use your legs to get under there head first (good exercise btw)
open ended spanner 10mm and 12mm as described in the guides, loosen up the 12mm locking bolt and then you should be able to break the adjuster bonded thread (caused by grub) with the 10mm spanner and extend the adjuster screw as needed by hand.
Give it a test drive before you lock the bolts back.
When gearbox is cold it did a marginal difference but probably will help a bit more when its properly warmed up. Worthwhile job regardless - just make sure the biting point is where it should be and clutch is not engaged when pedal is not pressed.