Customizable -Air Hose Reducer

Having bought a one-off cyclone from ebay I had to come up with a design to create the reducer to connect with the standard ridgid/craftsman shop-vac hoses @ the shopfloor.

FreeCAD 0.16 onwards provides support to the nifty spreadsheet based variables to be incorporated into part dimension for the required ultimate dimensions.

Attaching the FreeCAD project with embedded spreadsheet (named config) that has following params:
- param_small_radius ( enter the value in inch gets auto saved as