I gave up on a hood. Without a horse of a system it just won't pull shavings very well any distance from the hose inlet. Doesn't seem to matter to much about the hood design for me. So I rigged up an arm from an old drafting lite and have the 4" hose on it and I can position it close to the work piece. It gets a lot of the big shavings and pretty much all the respirable stuff which is really what concerns me most.