I'm with Prism on this. In fact I have made the triangles even larger--say an inch or so. Instead of trimming at the edge I leave the excess on and then trim evenly above the intersecting corner to allow the setting triangles to "float". Here's Marti Mitchell's explanation.
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http://frommarti.com/float.shtml
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Last edited by oksewglad; 01-20-2013 at 11:35 AM.