A lot of carpet you guys clean will allow for air to flow thru the pile easily from underneath, even so that an unglided wand won't even lock down.
Some carpet will not and wand will lock hard unless glided.
Your not always going to be at 20in lift.
Don't over think it, this machine Rob made will clean the shit out of some carpet.
The only machines I would ever buy
- Steam Action/robs tmf
- Relia built
- Aero tech.
Throw the sissy glide in the trash, lift the wand on the back stroke along with the carpet right off the floor and talk about lock down. Best have some abs jus sayin