A stop block was placed against the neck end and held with double stick tape. The orange clamp was loosened and the neck removed. Holes were drilled to make a starting place for the router bit. The small block will be placed at the end so the routed cutout will be square at this end. This wasn't necessary ........ the cutout could have been open ended. BTW..... I'm using a 1/2 in. pattern following bit.