Hi tom, I developed the Modular Skylight PIO for Velux and actually finished the first released version the day before coming to work here at Vectorworks.  It was a lot of work and, as you can see in the video, is quite capable.  I believe it was compatible with VW 2016 and needed a small tweak for VW 2017.  Unfortunately, it seems not many Vectorworks users ever found out about it and, due to the "lack of interest", Velux did not continue to update the Plug-in for later VW versions.  The o