Propole, please be careful about using insulting phrases about others on the forum, it isn' t allowed.
I completely agree with you however on rinsing on the glass.
If you do it right it doesn't make any difference at all.
I haven't used the vikan brushes, but some will argue that the flocked bristles will retain contaminants.
I use the Salmon brush with 2 fan jets, these are supplied by Peter Fogwill with his system, and work great in my own personal opinion.
Peter also removes a couple of lines of bristles and by doing so this allows a clear line for the width of the brush for the fan jets to operate.
The brush is also single filament, and this DOES mean that any contaminants are easily rinsed away.
I hardly ever rinse off the glass, there just isn't any need to do so, if your technique is right then it isn't a problem.
But each to his own, we are still doing the same job, its what we get used to, if you develop the rinse of hte glass technique and it works for you then great!
Ditto the rinse on the glass brigade

But rinsing ON the glass is most definitely easier!!

Ian