For the record I have run brushes, red, green, white pads, and stripped bonnets. The white pad is less aggresive. The green pad is the most aggressive but actually wears out a lot faster and is more likely to trip circuit breakers. The pad has an abbrasive cutting action to it. The red pad is the best option for glue down carpet. It starts out pretty aggresive but after a few minutes you almost get the sense you need more aggitation but it is plenty. The red pad lasts triple what the other pads last, runs easy, doesn't trip breakers, and does a good job. Strong chems, high heat, and plenty of dwell time will cut through most grease. Some carpets though need a good scrubbing and if they are that bad a brush may the best option. Green pads work for short duration scrubbings but they need to be broken in. Be careful because in no time you will almost be down to the pad driver. That is my experience. I need a new brush by the way. The one I have is eight years old and has been used for everything from scrubbing carpet, rugs, tile, concrete. I ditched the
glide a long time ago. Now the bristles are worn down. Buying that 175 was the best thing I could have done.