This is a pic of the towel filter l talked about. It requires minimal cooling after the gasifier, slightly moist gas doe no harm to it, aids to efficiancy actualy.
It works with woodgas too, but only if the gas isnt too wet. Then the water starts rinsing out the soot trugh the towel.
I know GarryG adopted this kind of a filter on his recent project, hadnt reported the resaults?