The workshop can be found here: https://ftp.lstc.com/anonymous/outgoing/lsprepost/Training/Intro/
Alternatively, it seems you CAN use the “Edge Spin” option to generate the elbow, the advantage being that there is no need to pre-create curves compared to the aforementioned approach. Position and Direction define a point on the axis of rotation and the orientation of that axis, respectively. (Position is oddly placed in the figure below, but you get the idea.)
You are navigating away from the AIS Discovery experience