I have been using the backflip since wintecs first sold them. It does take perseverence to master them but they do really work as a single pass tool. You have no problem in this hot weather with glass drying before you can finish sqeegying, you don't have problems in windy weather with blowback over the blade either. Since we learned about dog earing our channels I do far less detailing, I find I have to do more if the pane is narrower than the blade, but hey! you do it so much quicker you can detail and still save time.
A sigle pass tool is not really a good description, you can't do that. You have to ensure that you have plenty of water at the top of the pane before you can zig zag down in the normal way, this may mean that you go over the top of the pane 2 or 3 times. I have a van full of applicators and sqeegies of all sizes, but I use the backflip on 95 % of my work. I can do at least 2 houses on one dip of the bucket, thats a saving too. I use 1 x15ltr bucket a day and top it up once with a large milk container of water.
Hey Ross. do you find the rinse aid mixture makes any detailing so much easier?
I was talking to the guy that fixed my dishwasher today. He said that rinse aid makes water wetter. He said take some when you go for a shower, soap up your arm and pour on a drop of rinse aid and see what happens. I think I'll pass on that one. DAI