Craig
Some years ago, when we had only low powered pumps, we presprayed, set up the machines, then sprayed again with the wand, then extracted.
If you have a low powered machine, with decent vac' power, this makes a huge difference to the end result.
Getting 400 psi with a CFR was a revelation, this was nearly 10 years ago, surprised Alltec have'nt imported a powerfull American machine and just re labelled, others are doing very nicely, following this route.