I am trying a shadow weave for the first time. I know there are two shuttles used. I had initially thought that both shuttles would start on the same side first use one, change the shed, then use the other. However, if that is correct, then what do I do with the selvedge? I usually go under from one side and over from the other. Do I go (for example) under with the first pick from the left, and then under with the second pick? Or should I start each from opposite sides? Thanks in advance for your help.