Mine is Peter's system, works perfectly well, I have modified it to suit my own requirements of course.
Longer hose, bigger battery and so on.
I don't bother with the remote, I just kink the pole hose instead.
I've just replaced my R/O Membranes, they should have lasted longer, but I didn't flush them, and by the time I realised it was something that had to be done it was to late
Still, live and learn eh?
Now the membranes are dropping the TDS right down to 0.001 or 0.002 ppm, means my resin is barely needed!
Will soon be going for a van & van mount system, but Peter's trolley is also a vital part of the setup!
The Unger pole system is a bit on the whippy side when it is up over 30ft, and I keep meaning to get a different brush (hoping to adapt the Ionics domestic one to fit the pole. It's small and lightweight.)
Regards
Ian