I am having a heck of a time getting endpoints to connect to curves or other endpoints. I thought they were supposed to turn purple when connected (that's worked for me), but in this case neither purple nor green endpoints indicate success. First image: cage with end guides, plus longitudinal guide that is currently showing green endpoints (purple points = failing as a loft guide). Middle image shows initial loft (using guides with purple connections??). Third image shows loft failing when longitudinal guide is added in, along with error message. I don't why I'm not getting this crucial skill down, but joining endpoints is the CRUX of cage building. I can't move forward until I figure this basic step out. Any help is appreciated!