If you are just doing the first 4 inches or so with precise templates
(and I agree that from a results per effort view this could be the
right way to go), I would seriously consider eliminating the chordwise
waves on the rest of the wing surface. For laminar airflow you want
no more than a .004 inch bump or dip in 2 inches. You can easily
measure this with a dial indicator set up as Richard Johnson shows.
Using filler and sanding splines (always sand at 45 degrees to the
chordwise direction) it is not that hard to achieve this level of low
waviness. This lack of waviness is likely more important than
fidelity to the specified airfoil contour once you are farther than
about 4 inches from the LE.

Be prepared for a lot of work. But the results can be spectacular.

Regards,

Doug