Trippy,
All i can say is i have now been using fan jets for around 4 months ( just put on an aqua daptor for really instant on/off control ) and my rinsing time is far superior to when using pencils, every window now sheets and i have easily fitted an extra 2 cleans ( average size ) there is no overspay using fans, i use dual trim and cut the c/line bristles out or shorter this then acts as a channel which fills with water the full length bristles keep the water within the brush head, and you rinse with brush on or very,very close to the glass
Darran