There are however a couple of difference between the Openbuilds design and this Lead CNC Kit. None of the differences are that great and the Openbuilds YouTube videos available on putting the Lead CNC together are a great resource and starting point for everyone. Most of the differences are a result of customer feedback and modifications published on a wide number of internet forums.
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Attach both End Mount Plates to the C-Beam in the same way as the Y and X Axis. Make sure to insert T-Nuts for mounting into the C-Beam before attaching the last End Mount. Lead CNC Assembly Instructions v1.0...