Glad I helped Tripoyboy.
In my view probably the best thing that's happened to window cleaning industry is the introduction of the water fed pole, and the worse thing is the introduction of the flow controller. The flow controller wasn't introduced so that the pump can be turned down, it was introduced to stop the pump switches burning out. Since their introduction they are probably responsible for the biggest loss in time a window cleaner will ever have. If they hadn't been introduced most window cleaners would be earning more money, or spending more time with their family.