Truss rod jig

Here a mock up of what I am thinking

The bolts act as a clamp for the wood.

The thinner wood is designed to be replaced for different thicknesses of neck stock or could be curved for traditional routes

The bushing in the router rides in the acrylic (is a tight fit) so no chance of any slop

Just need to install the remaining t nuts and widen the bolt holes in the inside wood and should be done