Alex - got to give you 100% for trying to flog your gear

but without a decent pure water coverage
even top end brushes wont clean well
Winpro - yes there is less mist, but the fan becomes less distinct and narrows so loses effectiveness
with fans you would not have to lift off - so with ref to the other thread on the country houses you can bring
the brush to the top edge, wipe along without any water getting onto the frame wher you would with a pencil jet.
if you have a garden hose fitted with a multi spray patten gun you will see what i mean - put it on jet and spray it at a window - the jet hits the window in one spot, lots of water blows back but also 'mushrooms' so water is forced up and out of the brush,
set it to flat fan and hit the window - you will get a straight line as as the force is lateral and continues left and right not up and over the brush.
Bfg - personally never had any blockages with fans - hows the dirt getting into the system

Darran