I had a lesson from the card stacker himself at BODY last year! He now lives in Santa Fe btw. He taught a workshop of about 20 of us how to use his technique, which is a really cool way of leaning 4 cards together to create a strong (for cards at least) layer that can be stacked upon with more layers. The cards lean on eachother’s centerpoints in a square and then two cards are placed flat on top to create the roof. I was definitely the brightest one in the class, being the first one to make a 9 layer tower. Booyaah!