Tirage en Croix resources?

Hello,

I recently listened to Alec Satin's Tirage en Croix majors only spread class on Tarot Today radio. It is an excellent spread, and, I can tell, a very profound one as well. Does anyone know of any English-language resources, books or otherwise, that can teach me more about this spread?

Thank you!

Has anybody pointed you to this old thread? This is the version I have used.
http://www.tarotforum.net/showthread.php?t=95259

Thank you!