Since I haven't been able to find a side adjustment truss rod, I have decided to go with a Stewart-Mac Hot Rod double truss for my first guitar and I am going to place the adjustment screw at the heel.
Is there any reason that I could not drill a hole from the heel socket into the first pickup cavity to allow access to the adjustment nut, and allow for adjusting with out removing the neck ? The routing I am doing has a channel between the first and second pickup cavities that is deep enough to allow for inserting the allen wrench in this way.
I know that mechanically this would work, but I am concerned that any modification to the heel socket could affect the sustain and tonal qualities, if the neck does not fit firmly in the socket. Of course this would only be a 1/4 " hole and should not really make any difference in how the neck fits into the socket.