Why not just set up your lock-miter router bit this way?
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The mysterious hidden groove joint
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The common misunderstanding of safe router feed direction
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Infinity Locking Miter Bit Quick Guide, Lock Miter Woodworking Joint Easy Setup Guide
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HOW TO Use a Drawer Routerbit
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How To Use A Miter Lock Router Bit From Zokmok Tools
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This will make SO MANY of you very happy!
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Lock Mitre Router Bits
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