Areas to concentrate on.
Overall length. The wee area heading up the E tuner, tiny wee bit sanding. The rounded tip,get that right π
For the bottom curve to work,place the template on the back and mark the bare wood as the headstock leaves the nut. Move the template up to the rounded tip, make a mark as the tip sweeps to the bottom curve . Move the template again,swinging it until you came join both marks.
I'll see about getting a photo or 2 posted.