hi jason, i,m new to carpet cleaning and i,m very interested in lm cleaning,during the searches i,ve found your posts to be both interesting and informative, you always emphasise the pre vac stage and i was just wondering if the overall pre vac would benefit from being done with a crb prior to the actual vaccing stage..thanks a lot kev...ps ccould you please mail me the indeapth info that you have put together on the subject thanks very much....