I have seen two Ryko Softgloss 5 brush machines in the field with these "C" channel NeoGlide brushes on them. My impression was that they seem to slap the surface as they are flat and spaced out more than Ryko Foambrite brushes. One of the machines had added an extra steel plate to the top brush counter weight to balance it. I don't know if that site added extra brush sections to the top brush to cause the imbalance. That being said I did not notice any difference in the wash quality though.