Hi, I've just bought one and use the Jet 1100 extractor also from Ax, the PT asks for min 1000 air flow at 100mm and the jet gives a little more, the jet is reasonably priced with the option of the .5 micron filter as an add on, not cheap and something I'm saving towards.
Nice to know also that the 12" version of the same PT got a rave review in F&C this month,