I used my mom's G4
on her carpet, came out looking great BUT after the bearings on the vacuum started screaming a couple weeks later. I called Kirby & they said that I set it up wrong.. took the machine in, showed them how I set it up, they said that wouldn't do it so he tried it, & the smart azz found out that water was being pulled in some how so now the vacuum just sits in the closet & she uses the Sentria I got her. Once I get back there, have to tear it apart to check the bearings. Hopefully this won't happen to your machines. CHEERS!!
Mark D.