Hello Curt,
Not written yet. On Tim's to-do list....
However, Tim did shoot a video demonstrating a technique for building hinged points. Its an "After Hours" video, meaning he doesn't do any narration, but the video is pretty clear as to how he builds hinged points. You can watch the video here:
http://tinyurl.com/d8qey5Our Slip Switch document also includes a section that describes how to build hinged points in an assembly fixture. The section starts on page 26 of this document:
http://www.handlaidtrack.com/documents/ug17.pdfI hope that this is helpful.