1.0 link Rainbow Dash Network http://rainbowdash.net/ adiwan (adiwan) http://rainbowdash.net/adiwan http://rainbowdash.net/notice/5483768 The air duct I was using for years is utterly apple. With my latest attempt I saw that the fan has not enough pressure to push the air through. I only noticed it now. I modeled one myself with less restriction in flow. I'm confident that it is better but I didn't use any simulations or other verification.