I believe the wittaker, brush pro and others like it are manufactured in Austria of all places. I use them everyday. They are fast relativaly light and do an amazing job scrubbing the carpet. You can buy different brushes depending on the type of carpet. I use whittaker grey ones most the time and they work great on carpet without to much aggression. I have a host machine and it got me started in the
crb world but the production times with a lomac, gls, brush pro type machine is so much faster.
Get aggressive brushes and they will also make fast work of tile.
Get an edging brush from whittaker and those edges of commercial carpet that the cimex wont get are quick work with the
crb. I use a battery sprayer, mist the edges and then run the edge brush around the outside.
They will pop up used from time to time for about 1.000-1,500