LR Baggs M1A - Manual (Page 3)

3 . I N S T A L L A T I O N
3.1 Strapjack installation: If the guitar doesn’t already have a
strapjack or a hole in the tail block, it will be necessary to drill one
in order to use the strapjack.
This jack requires a clean
1/2” hole in the tail block
of the instrument. If the
guitar lacks this hole,
start by placing a piece
of masking tape on the
outside of the instrument
over the drilling area (to
avoid chipping the finish),
drill a small pilot hole in
the tail block and then
follow with a step drill. Now proceed with the installation.
Remove the strap ring, retaining nut and one washer from the
end of the jack. There should still be one star locking washer, one
flat washer and a nut remaining on the jack. Bring the jack down
through the sound hole into the body and insert it into the pre-
drilled hole in the tail block.
Using the internal nut (be sure to include the flat and star
washers), set the proper depth that will allow the entire smaller
threaded section to protrude from the instrument (see figure).
With the jack in place, lay the remaining washer over the threads
and attach the external retaining nut until it’s tight. Finish by
attaching the strap ring (it should cover the retaining nut and
washer). Note that asserting too much pressure may crack the finish.
tail
block
smaller
threaded
section
protrudes