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Read carefully before installing your GK-3.

Check the dimensions and requirements below to make sure that the GK pickup and controller can be attached to your guitar.

* The radius (R) adjustment on the GK pickup covers a range from approximately 184R to 400R.

* If GK-3 is attached for prolonged periods of time to a guitar with a lacquer finish, you may notice a slight discoloration on the finish when you take it off.

Dimensions
Requirements
If you are not using the pickup holder:

A
Make sure that there is a space of at least 8 mm (3/8") between the bridge and rear pickup.
B
Measuring from the middle of the 1st and 6th string, make sure that there's a clear space of at least 61 mm (2-7/16") towards the 6th string. The surface should be flat and nothing should be blocking the way, such as screws and volume/tone knobs.
C
Measuring from the middle of the 1st and 6th string, make sure that there's a clear space of at least 42 mm (1-5/8") towards the 1st string. The surface should be flat and nothing should be blocking the way, such as screws and volume/tone knobs.
If you are using the pickup holder:

D
Make sure that there is a distance of at least 15 mm (5/8") between the rear pickup and the post that holds the bridge in place (on the 1st string side). You will need an extra 2 mm (1/8") of space if the pickup holder is in contact with a bridge saddle adjustment screw.
E
The distance between the center of the GK pickup and the rear edge of the guitar body must be no greater than 280 mm (11-1/16").
F
Make sure the guitar's body is between 40 mm (1-5/8") and 60 mm (2-3/8") thick (*1).
G
Make sure that there is a space of at least 9 mm (3/8") between the center strings and the surface that you will be attaching the GK pickup to (*2).
(*1) In some cases, you can attach the GK pickup to a guitar that is thinner than 40 mm by using the included cushion.

(*2) As a general rule of thumb, use the included spacer to adjust the GK pickup height so that you have a space of about 1.0 mm between the GK pickup and the 1st and 6th strings when these strings are held down at the highest fret.

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