3D Printing BT-20 to BT-60 Transition / Adapter

[Jack Hydrazine]

This 3D object is a transition from Este BT-20 tubing to BT-60 tubing. The distance between the two sizes of tubes (transition taper length) is 2.0 inches (50.8mm). It is similar to the Estes TA-2060 (P/N 70012) transition/adapter.

There are four models:
1) Solid,
2) Solid with a 3.2mm hole to allow for screw eyes to be fastened to it,
3) Hollow,
4) Hollow with end caps.

https://www.thingiverse.com/thing:4949461