Hello Neil,
I have extraction on my table saw,also my mitre saw,radial arm and band sawwith a flexible outlet for the lathe, mostly my own contraption.It works fine except for the guard extractor, that doesn't take as much away as I would like as I had to use old vacuum cleaner pipe which reduces the flow of air. I used "T" joint and blast gate from the Axminster kit to connect the guard pipe to the extractor.My dust extractor is a 2 hp Nutool which has enough power to service more than one machine,I bought it on E-bay,almost new.As I work in my cellar I though it best to go for over-kill as there is little natural air flow down there.If I can be of any help just e-mail me.