mark, i have done large area office cleaning without a problem at all with the rx20, personally i don't know what this thing about whicking is, i have done some real mingers and they have all been fine. yes, you would best be working as a 2 man team, one pre-spraying and moving, but we still clean about 100 sq mtrs an hour and it's a clean down to the bottom of the fibres not just the surface and i am still impressed with the way the rx pulls up the fibres under the desks/chairs where the pile is really flattend down. i HAVE to use a pad system for one large job i do in the middle of london and i hate it, it's quick but no way is it as clean as hwe
colin