"I don't press my seams open, but the banister rail is a good idea. However I have a tailors tool that could also be used to press open seams. I do use the tailors tool for garmet construction. Which seams do you press open in quilting, certain blocks or all of the seams?
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I press most of my seams to the "dark" side or at least to one side. The seams that I press "open" are the binding, when I'm piecing borders together, and if there are a whole bunch of seams meeting together.