80m (ish) of minibore,
i use setting of 50/60 regular cleans small windows. First cleans, or big shop windows, i blast it up to 69/80. But i like full blast.
Still can't manage to change the cutoff settings. Tried and tried, they just end up ping me off,so i leave it as it is. Works fine enough.
I'm thinking that 20 would be a dribble.