Hi all. Hope you and yours are well. I'm summoning the will to make up a neck template and neck, and to resaw boards for a new body (maybe a thinline, for variety) I bought a pre-slotted fretboard from ebay, but my current cause for procrastination is that none of the edges seem to be square or straight. Does beg the question whether the slots will all be parallel, but they look plausible. Any tricks for how to find a useable centreline with best chance of being perpendicular to the fret slots?