Wacom Pressure sensitivity

So far, it's workable - but still need tweaking :
1. the pressure sensitivity

# Option "PressCurve" "0,75,25,100" #Softest curve (loose pressure)
# Option "PressCurve" "0,50,50,100"
# Option "PressCurve" "0,25,75,100"
Option "PressCurve" "0,0,100,100" #linear curve (default)
# Option "PressCurve" "25,0,100,75"
# Option "PressCurve" "50,0,100,50"
# Option "PressCurve" "75,0,100,25" #firmest curve (hard pressure)

2. the "eraser" option

On the left is a paintbrush version of the previous post's Elvish fighter with a shield - that wasn't there in the previous version.