Customisable Parametric Duct & Pipe Adapter

Parametric Pipe & Duct Adapter (Round ↔ Rectangle, Offset-Capable)This is a fully parametric duct reducer/expander for dust collection and ventilation projects such as window ducts. It generates a hollow adapter with a straight insert on each end and a smooth transition in between. The key feature is that each end can be round or rectangular, and rectangular ends can be shifted in X/Y to line up with off-center ports (super handy for shrouds, tool ports, and awkward clearances).FeaturesRound or rectangle on either endRectangle width/height + X/Y offset (move the rectangle to one side to match your port)Adjustable wall thicknessAdjustable insert lengths on both endsSmooth transition section (length adjustable)Optional lead-in chamfer for easier sliding fit (round ends only)Optional retention stop rings (round ends only)Optional transition ribs for strength (round→round only)Optional bolt flanges with bolt circle + hole count (round ends only)Debug cutaway mode to check wall thickness an