Hi Fivetide,

Thats a brilliant idea :) I was wondering actually if this might be a suitable kind of filter to use on my vacuum pump which I intend to use for a vacuum table on my router? I was looking around to see what filter I would need and they all just look fairly bog standard, but not bog standard prices... The pump is a regenerative blower / vacuum type and is rated at about 6.5 HP. Anyone got any ideas? A tenner is pretty damn cheap to try out, but the pump isn't if it buggers up....