With each fold I made a "witness mark" so that I could tell if the canvas was staying centered. When I did the roof I had a problem with the canvas shifting to one side and it was sometimes a pain to get it re-centered. With the "witness mark" at each fold it reminds me to check and to easily verify that the canvas is staying centered.
To go through procedure again. First I mix the TBII 50/50.
Next I apply glue to the body. I use a 4" brush for application. I apply glue to the body till I cannot feel the brush "drag" but is a nice smooth "slippery" feeling. I brush on enough glue to the body to lay one fold of the canvas into.