I'm pretty convinced by all your technical knowledge re: WFP systems on here.
how do you get to all the windows? I have some buildings which cover a big area.
for example, to get around the back of some there is only one way in, not big enough to get vehicle through, no outside water supply, about 100 metres from vehicle. How do you WFP round these type of hurdles? I probably don't understand the concept yet.
Pj