Using my patented handydandy temporary tailpiece.....run two strings the length of the guitar and move the bridge around until the octave fretted note is the same as the 12th fret harmonic. digital tuner on the phone is more accurate than my ears......
once the bridge is in the right place, cut round it with a sharp knife.....
somebody scratched my guitar!!
then, with a chisel, remove the paint down to bare wood. wood glue sticks wood, not paint!
then glue it in place. wipe off any squeeze out glue with a damp tissue.
once it's dry, drill on through the string holes
then sand the saddle to bring it down to height.
drill a hole for the piezo cable and drop it in
still a bunch of tidying, but its starting to look like a guitar!