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Guitar Making and Repair/Johnson JM 991 Neck Repair


Hi Paul,
I have a Johnson JM 991 tri cone that i just acquired through a trade. The neck is very warped at the 12 fret. Upon inspection  I noticed that the interior support (maple 1" x1") that is attached to the neck at the heel and runs from the front of the body to the rear approx 18", and is support by 3 mushrooms - is broken where the  heel of the neck join this interior support. The neck is mahogany and this support is maple, so I assume that this maple support was some how attached to the neck by some type of adhesive during manufacturing.

My question is: If this main support is broken, is this a problem that can be fixed or do I have a worthless guitar.  Thanks in advance for your help!   Kerry

Hi, Kerry!

Yes, this is a repair that can be accomplished by a patient pro with the proper equipment and materials.

Yes, I do this sort of repair. If you'd like to contact me off-list, send some photos to . I'll respond in short order.

--Paul Wilczynski

Guitar Making and Repair

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paul wilczynski


Anything concerning building, tuning, theory of construction. Specialist in finishing (40 years' experience); extensive knowledge of Rickenbacker instruments of all vintages. Rickenbacker factory connection on personal level; ONLY licensed Rickenbacker luthier in the world.


Extensive. I build and restore electric and acoustic guitars (steel string and nylon classicals). I build all of Rickenbacker's acoustic instruments in my own shops in San Francisco and Healdsburg, CA. I write two online columns with a total of over 15,000 posts since January, 2005. Google my name or my screen name, "jingle_jangle".

American Guild of Luthiers.

Mostly automotive and hobby (in the past).

Manage the University Department workshops(Industrial Design) in SF, also have taught and written design and fabrication classes for almost a decade. Have produced online classes, written curricula, syllabi, etc. Run an online forum for my students (500 in number).

Awards and Honors
Awards won for product, vehicle, and preschool toy design in the past.

Past/Present Clients
Rickenbacker International Corporation, Waterstone Guitars LLC, many Fortune 500 companies before I worked in guitars (I ran a design studio for 22 years). I have hundreds of individual--private party--customers.

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