When this is made,
cover the top part with newspaper, screw the two temporary battens
from underneath (no glue), place the longest piece of timber over
the jig and battens, mark holes for two screws each side and make
pilot holes for the screws. Each short plank will be screwed and glued
to the battens. Put glue also on the butt joint between each plank.
The newspaper will prevent the soundboard from adhering to the jig.
When the glue is
dry, remove the screws from the top so that the whole surface can
now be planed, scraped, and glasspapered. To do this you must, of
course, secure the jig to the bench by means of four screws, one at
each corner.
When you are satisfied
that the surface is true and smooth, draw a pencil line in the centre
from top to bottom. You can now make the under string bar and
also the upper string bar according to the measurements in fig.
1.2; make sure these bars are perfectly straight. Take one bar
and glue it over the pencil line on soundboard, but do not use nails.
Place weights on top of the bar, and leave it overnight.
