Fyi
I used my avalir shampooer on my g4 vacuum. The g series are all interchangeable. Through diamond or ultimate g the only main difference is the sticker on the belt lifter.
I used suds o gun and zipp brush to rub shampoo into carpet. It was like 6 ft strip on the side of my bed. I spilled a few things and was bugging me.
The multi surface shampoo system retails for $250 has a brush for hardwood floors.
I may post a pic tommorow.
Les