Originally Posted by
QuiltnNan
I sewed two pieces together with the top one being larger to make a D. This works great.
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This is what my friends do - they found that foam core bent permanently when they carried something too heavy (in one case) or when someone banged into them/their purse at an odd angle at a quilt show (the other case) - so they came up with this double-plastic canvas idea, but they covered it with fabric for each removal (but if forgotten could still go through the wash).