Got the extractor. Built it and just thicknessed some oak with barely any chips left on the bed and not a single bit pressed into the wood. I'm happy. I've put off getting a bigger more powerful HVLP because of costing as much as the PT I will use it on, and taking up more space, but I see now there's no point having a PT without something which can shift the chips away.
Cheers Mike! Very sound advice.