I laminate my neck blanks. The neck blank is 1st ripped down the middle a table saw, and one half is flipped in relation to the other. I then take a flatsawn strip of hardwood and sandwich it in the middle of the 2 halves. In times past, the hardwood strip was ebony or rosewood; in this instance I had some flatsawn maple on hand that suits the overall aesthetic of my current batch, so it gets the nod. When the 3 pieces are glued together, the resulting end grain looks something like this: ///////III\\\\\\\ . I’ve been doing it this way for some time now, and the necks have stayed straight.