Hi all. I have just finished a homemade router table and am trying to set up dust extraction. Having already used the set-up during construction I managed by connecting up an old house vac to collect chips from the back of the fence. This collected well but needed emptying every few minutes. My large Axminster dust extractor is already fully utilised by the table saw, planer and thicknesser so I am thinking of getting a second-hand extractor of some type specifically for the router table. My query is what spec do you think I need for this application. 2nd hand ones seem to have air flow from between 500 and1150m3 per minute, is this enough or does it even matter? Or is the HP what I should be looking at? Planning to attach extraction on fence and via dust box under the router lift, the fence port has a 63mm outlet dust box size outlet not yet decided. Any help and suggestions welcomed. Thanks.