I created this connector to mock up a dust collection system for my shop. If you print it with the inlet opening at the top it should require minimal supports. The walls are pretty thin to reduce material usage so you may need to do some extra work if you are using a material that has issues with layer adhesion. Do not use this in an active dust collection system unless you are very familiar with the fire/explosion hazards that can occur from static build up in such systems and have actively mitigated all of the risks. When I create my final version I plan on using some conductive filament I have to allow for grounding. I'm not sure if this will resolve this kind of issue, so if anyone knows I would really appreciate comments on it.