Dome build methods - flattened conduit

This is the first of a series of videos looking at dome building methods, what works what doesn't and some pro's and con's for each build method. Flattened conduit is a really simple, cheap way of building a reasonably strong dome framework but it's not easy to cover with anything other than canvas. The most common question I'm asked about this build method is how to calculate the bend angle on the end of each strut.
Here's the link to the dome bend angle calculation page:
geo-dome.co.uk/...
Dome calculation tools page:
geo-dome.co.uk/...