I'm building a jazz bass and I have a neck from allparts with the truss rod adjustment at the heel. I'd really like not to have to take the neck off to adjust it, so I was planning on making a little channel in the body and pickguard. The thing is, the adjustment isn't an allen wrench adjustment, it's in the shape of an X so a screwdriver would fit it. The alen wrench is handy because it has a curve at the end so it can fit in the channel. How am I going to make this work with a screwdriver adjustment?