Thanks everyone for this discussion. Looked up Sharon Schamber's method.. OM Gosh, I'm trying this on this practice quilt I'm doing.. Yay!! Here's her link. I folded a strip of paper to try get it right in my head... Ya well...that's my method, it has to be visual..
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http://www.sharonschamber.com/free%2...ng%20Class.pdf