spiral ducting for new extraction advice needed

[frosties]

Hi there. I've just bought the following items and need to get the spiral ducting sorted out
Bandsaw/resaw
http://www.startrite.co.uk/index.php?se ... and+Resaws
Planer thicknesser
http://www.startrite.co.uk/index.php?se ... hicknesser
Extractor
http://www.startrite.co.uk/index.php?se ... Extraction

The hose outlet for the extractor is a 220mm. I'm trying to work out when the best time to use a reducer?? do I reduce by the extractor? do I have a reducer just before the machine?
Heres what I propose to do

I appreciate any advise before I splash out on ducting blast gates and angles. I'm not too sure if the unit has enough oomph

Print by frostie's, on Flickr

 

[ProShop]

Always reduce as close to the machine as you can get, NOT at the extractor.

Are you planning on using the alloy gates supplied by spiralux, I ask because the ones I got leaked a bit of air. I returned mine back for a refund & made my own.

 

[frosties]

Thanks Pro shop. Not chose a supplier yet but thanks very much for the heads up