I was going to go for the trigger option, fixing trigger to bottom of my pole and therefore regulate the water at a touch.
however, i also wanted to have just one pole (unger 5 section)
I could attach trigger to bottom of pole, BUT...
Would be carrying a big weight around and having perhaps loads of loose pipe between trigger and brush when doing lower windows. Not desirable.
With Peter's autobrush, which i have just ordered, i should be able to use length of pole needed (detach lower sections) and go straight to work. no worry about trigger.
Also going to have addable/takeawayable section of 10mm pipe, for changing between occasional high work and the usual not-as-high work. Saves having too much pipe flapping around all the time.
so all in all, autobrush, should be just-the-job
As Peter said "the best way to switch the water on and off is at the brush. all brushes will be like this eventually. ". he might just be right.
cleva!
ben