I use a Gardiner Resi-Neck with Swivel.
In most cases I have the brush set at the 45 degree (I think that is what it is) that it comes naturally set at for doing upstairs windows.
However, when I'm doing downstairs, especially patio doors, I set it so that that the brush is at 180 degrees.
Some upstairs windows, in side alleys with a six foot fence alongside, I set it at 90 degrees. I'm usually stood almost underneath it getting wet.
Anyone else do this, as I notice anyone using a ''super-lite carbon fibre quick release gooseneck has to use the fixed angle?