CAD a D8

The goal of this instructable is to CAD a D8 with only 1 parameter

Link to my object

CAD Software, I use OnShape as it is free

1. Make a Square whose center is on the origin and the points are on the axis of the other planes
2. Add your one dimension to say how big the square is
3. Add a construction line from the constrained point down along the "Right" plane
4. Make the construction line be equal (same length as) the side of the square

1. Make a construction circle whose radius is the height of the square
2. Make two construction lines from one point to the edge of the circle
3. The lines should end on the front plane, above and below the origin

1. Loft the base square to both the top and the bottom points found

You now have a "blank" D8!

Feel free to add numbers to it or whatever else you want!