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[Steve Wastler]

From the description, 28-29 & 30-31 standard. It is a seperate filler not part of the bows. All the ones I have and had have a Masonite type product. There was a tthread sometime back of making your own filler with wood shavings/dust and epoxy or glue. I don't recall exactly, you could do a search and most likely find it. There is a member 28pickuppain? That used 1/4" wood strips and epoxy, his finished product looked great.