B-band UST, Installation Instructions And User Manual

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at page 26. Prepare the guitar for cutting the preamp hole with the
rotary wood router by securing it in some way so that the guitar does
not move while doing the cutting. Cut out the area for the preamp
using the rotary wood router with a sharp 1/8” / 3 mm cutting bit.
Do this slowly and very carefully so the router’s cutting bit does not
accidentally move outside the area that you have marked with the
guide. Smooth the edges of the finished hole with a small file or sand
paper and remove the masking tape.
5.9.
Before installing the battery holder it should be checked by insert-
ing a 9-volt battery in and out of it to learn how it works. The clip that
holds the battery in the holder is stiff to hold the battery firmly even
while transporting. Once this is checked, find a convenient place inside
the guitar where the battery holder can be reached and that there is
good access to move the clip that holds the battery. Also check that
it is in a place that the battery can be put in and out easily.
Recommended places are at the neck block or at the back of the
guitar.
Do not attach the battery holder to the back of a preamp.
Be sure that the entire adhesive surface will make full contact with
surface you are attaching it to. Clean the surface with a moist cloth
and let the moist dry completely. Remove the protective liner from
the supplied piece of 3M VHB-adhesive and install it. Press firmly for
about 30 seconds to make it secure.
It takes 72 hours for the adhesive to achieve its final holding
ability.
5.5.
For A3.2 or A4.2 put masking tape to the upper bout of the guitar
and mark carefully the holes with a punch (spike) using the drilling-
hole guide at page 22. Drill 7mm (9/32”) holes for the potentiometer
shafts, 3mm (1/8”) holes for mounting screws and 5mm (3/16”) holes
for the lo-batt LED and, if installing the A4.2, holes for the UST / AST
input gain controls. Use a small file or sinking drill bit to smooth the
edges of all holes carefully and then remove the masking tape.
5.6. For A5 and A6 installations, please read the following care-
fully:
It is very important to check inside the guitar body that there is
enough clearance for the preamp at the side between the soundboard
and the back of the guitar.
The sides of the guitar where the preamp will be installed should
be inspected for accessibility and stability. Inside some guitars there
is kerfed lining (the wood reinforcement between the back and sides
inside the guitar) and other reinforcements that may make the area
too small to install the A5 / A6. If these reinforcements are altered it
may cause instability at the guitar’s side.
Guitars with solid sides or that have very thin sides may not be
stable after cutting a hole to fit the A5 / A6. It may be necessary to
reinforce this area from the inside of the guitar with an extra piece of
plywood before cutting or drilling holes. The thickness of the guitar
side should be at least 2 mm / 5/64” and preferably 2.5 - 3 mm /
3/32” - 1/8”. If needed glue in a piece of plywood of suitable thickness
to reinforce that area.
Please consult with a qualified luthier, technician, guitar dealer or the
manufacturer of the guitar about performing the above.
5.7. For A5 or A6, find a location at the side of the guitar at the flattest
place between the waist and the shoulder of the upper bout. Be sure
to check that the transducer will reach the preamp from its position
under the saddle and / or bridge area.
5.8.
Cover the planned installation area with masking tape and mark
the area with a pencil using the provided preamp hole-cutting guide