To answer a few questions ,
Shoe size 11 , but they stretch with all the pre-spray
Cleaned using Nemesis
Te carpet was a Flotex type pile.
Who says 175 rpm is the correct speed for rotary? I have never had an issue , I have tried to burn one with old carpet from a flood ,, it takes over 30 seconds stationary with a dry pad to make a mark on the carpet I used , 10 seconds less than it takes to burn with a slow speed.
The pads are tuway pads from Jon-don in the states , not bought any for a couple of years. It is very rare I agitate pre spray , if the carpet appears that soiled eg pub/club , I do not want the job .