40x20 Thicken Blower Duct
thingiverse
I modified uncleskippy's design (https://www.thingiverse.com/thing:2204314) by thickening the bottom side. The original version worked well for a while, but the thinner bottom edge began to bow after printing 10+ times. I also added an angled "spacer" on top of the screw holes that attach the duct, which creates a force to help pull the front up. Don't forget to increase your infill percentage or lower layer thickness to compensate for the thicker bottom side! Note: I've only printed with PLA so far and haven't tested printing with any other materials yet.
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