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Fasten and brace the boards together with two parallel metal strips and small backup strips on
opposite side each two angle-shapes toward the outside of the circle and two flat strips nearer
the center.
Cut each disc to shape along the edge of the circle you have traced.
On the unbraced side of each disc, trace an 8" diameter circle around the center.Draw a diameter
line on each disc, at right angles to the seams between the boards.
Cut a square with 2" sides at the center of each disc.Center the square as accurately as possible.