i'm about to embark on a fretboard refinish/refret project on my harmony archtone. i've done a lot of research and acquired the right tools and i'm pretty confident that i can get it done well.
there is one thing that is plying me. the guitar in question has a "steel reinforced neck" ala:
basically, instead of an adjustable truss rod it has a piece of steel square bar running through the neck, just under the fingerboard (i saw it when i had to reglue the fingerboard; the previous person who worked on it did an absolutely terrible job.)
my question is this: is it alright if i sand the board with a radius block just as it is, once the strings and frets have been taken off? i've read that before sanding a fretboard, the neck should be as straight as you can get it by adjusting the truss rod, but obviously this isn't adjustable. were fixed truss guitars designed to have straight necks with strings off? or were they designed to have some negative relief? - and if so, by sanding it as is without propping it etc will i end up having too much relief?
i'm hoping that this isn't going to end up being as complicated as i fear it could be..