For any random fitting you need to make, this OpenSCAD parametric file is really cool. I do not use openscad, but I was able to install it and spit out a simple fitting in <30min. Good for dust collection fittings.
Options:
- Connector: Hose adapter
- Connector: Magnet hose connector
- Connector: DysonV6
- Connector: Flange
- Connector: Nozzle
- Transition: Straight tapered
- Transition: Angled
- Transition: 1 to many
https://www.printables.com/model/282014-parametric-vacuum-hose-connector-with-magnetic-con