_:n33e7fe1870da4dccb19372df8b4cb4f1xb7
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"Sandran,\n\nIf you are using 1x2 boards for the side and back stops, then they are 3/4\" thick. You also need extra width to allow for the bolts on the press bar to sit outside the book block area - an extra 2' inches on each end is more than enough. The side stop can overlap into this margin to keep the whole thing a manageable size.\n\nSo, a 9\" x 12\" book would require a minimum 9 3/4\" x 16\" base.\n\nI hope this is helpful,\n\nAndrew"
<http://www.diybookbinding.com/diy-bookbinding-jig/?replytocom=795>