stick at it dazmond, when i first started on the pole i was slow and had doubts, now i would never go back to using ladders i have given away all my work which needs ladders to a local trad lad,
in my opinion your using way too much water having it on 60, if your getting runs and spots then YOU are doing it wrong its not the system which cleans the windows YOU are so you are to blame.
all this talk that wfp is crap on 1st cleans is a load of balls, i can do first cleans with all the frames etc faster and to a higher standard than i ever could spidermaning it up a ladder.
50 litre trolley? well rather you than me! get yourself a decent pole your using a crap pole with a crap brush