I did this by making a curved template and then I used a plane with a spacer on the back end of a block plane to create a radius. The spacer angles the plane such that it makes the bottom of the block plane tangent to the curve of the braces. As more and more is taken off, the braces take on the radiused shape.
For the neck, having glued the scarf joint and the blocks that make up the heel of the neck I cut the truss rod channel. I'm using the LMII standard truss rod that requires a 3/16" by 3/8" channel. I cut this with the table saw.