Some simple ducting made from the Shapeways and Evergreen stuff
Shapeways has some nice ductwork for roofs etc.Evergreen #199 is the perfect extension.
https://www.shapeways.com/product/LUBCBJ...d=62718849
Shapeways has some nice ductwork for roofs etc.Evergreen #199 is the perfect extension.
https://www.shapeways.com/product/LUBCBJ...d=62718849
Reinhard