Just a bit of history on the two different assemblies.
The brass fan spray is off a 6 year old carpet cleaning wand and has been on a heckuva lot of brushes in the last four years.
The plastic ones similarly have seen life on a lot more than one brush so they are starting to look a bit tired.
When against the glass they may over spray sideways (but that doesn't matter - there is not a massive amount of overspray).
When you are spraying near the top of the glass and brick it is all about technique. We never had a problem with overspray - even at 15 metres!!
Rob
