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D extension headstock mod

Discussion in 'Luthier's Corner' started by KisekaeVIM, Oct 19, 2020.


  1. KisekaeVIM

    KisekaeVIM

    Aug 12, 2012
    New York
    Long time ago I've designed a headstock with D extension and made a mock with "balsa(!)" wood. I've showed it to some manufactures but no one seemed to be interested.
    I think that was more than 10 years ago and now I found the long lost
    blueprint in my old computer so I decided to try making it by myself to see if it actually works.

    Modding a neck with tiltback headstock would be much easier but
    I don't want to custom order a neck for this "it-CAN-fail" experiment/prototype so
    I will use my cheap Squier neck as a victim.

    I've plugged the tuner holes, cut the headstock and glued a scrap wood.
    The scrap wood wasn't thick enough so I had to laminate a thin plywood.
    Sloppy works everywhere but I will paint the neck all black so they won't be visible.

    t01-1.JPG

    Katsumi
    KISEKAE Virtual Image Modeler
     
  2. Definitely interested to see more.
     
  3. Reedt2000

    Reedt2000 Supporting Member

    Apr 26, 2017
    Central New Jersey
    me too, sub'd :thumbsup:
     
  4. KisekaeVIM

    KisekaeVIM

    Aug 12, 2012
    New York
    Checking the extension wood fittings. I am not gluing yet, just checking. I thought making this part would be very difficult but it was easy to make a reasonably accurate part. It may not be perfect but I don't see any gap and I think titebond will take care small errors.

    t02-2.JPG

    t02-1.JPG


    Katsumi
    KISEKAE Virtual Image Modeler
     

    Attached Files:

    Beej and Reedt2000 like this.
  5. KisekaeVIM

    KisekaeVIM

    Aug 12, 2012
    New York
    Cut the nut shelf. GAaa! I don't like this fretboard! It is some kind of synthetic material which is very hard to work with.

    I made a hole for a tuner's string post. I didn't use a router template and a router for this hole. I just drilled three "eyeballed" forstner bit holes and connected them using a file. Ahhh...another sloppy work..
    t03-1.jpg

    Katsumi
    KISEKAE Virtual Image Modeler
     
    Matt Liebenau, Reedt2000 and Beej like this.
  6. Beej

    Beej

    Feb 10, 2007
    Vancouver Island
    Reedt2000 likes this.
  7. KisekaeVIM

    KisekaeVIM

    Aug 12, 2012
    New York
    Yes, I've read that post 13 times. Very cool headstock and body design!
     
    Beej and Reedt2000 like this.
  8. Beej

    Beej

    Feb 10, 2007
    Vancouver Island
    Me too, roughly. :D
     
    JIO likes this.
  9. JIO

    JIO Gold Supporting Member Commercial User

    Jun 30, 2010
    The Mission SF/CA
    musician/artist/owner - Gildaxe
    Hah! Thanks Beej - I forgot I stated that thread! Having said this, I actually have recently developed a working prototype in this Covid period. I will preview it on 'my' thread - :)
     
    Beej and Reedt2000 like this.
  10. KisekaeVIM

    KisekaeVIM

    Aug 12, 2012
    New York
    Let's glue the extension base

    t04-1.jpg


    and ebony finger board

    t04-2.jpg

    Wait..Oh nooo! I need to drill a tuner hole from the side.
    But if I simply drill the hole, the wood of the opening side may tear out.
    I should have drilled the side hole first and then drill the oval top hole.

    Katsumi
    KISEKAE Virtual Image Modeler
     
    Reedt2000 likes this.
  11. micguy

    micguy

    May 17, 2011
    I work for a manufacturer - not of basses, but other gear. We have specific training on what to do if someone comes up to us with an invention idea - from a manufacturer's perspective, that's a huge minefield of potential lawsuits - I'm not surprised that you have no expressed interest. If you patent the idea and then ask, it's much easier for all involved to talk, as who owns what is clear at that point.
     
    davidjudd2 likes this.
  12. KisekaeVIM

    KisekaeVIM

    Aug 12, 2012
    New York
    How can I get a patent and how much will it cost? Problem is I don't have money..
    Are there any service which let me get a patent at low cost and somewhat "share" the right? As far as I know my design is not similar to others. If anyone has any idea or suggestion please send me a PM.
     
  13. Slidlow

    Slidlow Supporting Member

    Apr 15, 2009
    Oshawa, Canada
    Well last time I checked it was upwards of $20K (20 years ago) for a US patent. Also you have just put your design out in the public domain.
     
    BeeTL and JIO like this.
  14. KisekaeVIM

    KisekaeVIM

    Aug 12, 2012
    New York
    I've done some research and decided forget about the patent because;

    *nobody would want to copy my stupid design anyway.
    *D extension market must be very small so I don't think guitar makers want to sell it.
    *someone else might be already making similar necks.
    *getting an official US patent can cost more than $10K
    *even if protected by a patent, China can copy anything and it will be very difficult to fight
    *etc, etc...

    If you have any idea or suggestion on protecting the right, please contact me via PM and I will focus on the headstock modding process in this thread.

    To avoid tear out, I put sacrificial wood pieces in the oval hole and at the side of the wall.
    t05-1.jpg

    (this sacrificial wood is 4A flame maple!! am i crazy??)
    t05-2.jpg


    Then drilled a tuner hole. It looks okay to me.

    t05-3.jpg
    t05-4.jpg

    Katsumi
     
    JIO, T_Bone_TL, Beej and 2 others like this.
  15. KisekaeVIM

    KisekaeVIM

    Aug 12, 2012
    New York
    Let's put a bevel for string clearance.
    I've used a hand file first but of course the bevel didn't look nice so..

    Protect both side of the hole.
    t06-01.jpg


    and use hand drill and slim sanding drum like this
    t06-02.jpg


    Okay, the bevel cut is clean now but the string is still touching the wood. I need to make a bigger bevel.
    t06-03.jpg

    BTW, this is why I made a balsa wood prototype 10 years ago. I wanted to make sure if a tuner can be installed in this tight space.

    t06-04.jpg

    Hmmmm...still not enough.. but wait.. Aghhh!
    fox-hee.jpg
    What am I doing?
    My plan was to wind the string this way!!

    t06-05.jpg

    ...too late..i didn't have to put that big bevel......

    Katsumi
     
    Matt Liebenau, TerribleTim68 and Beej like this.
  16. Beej

    Beej

    Feb 10, 2007
    Vancouver Island
    Clever use of the drill/sanding drum! :thumbsup:
     
  17. JIO

    JIO Gold Supporting Member Commercial User

    Jun 30, 2010
    The Mission SF/CA
    musician/artist/owner - Gildaxe
    yep - once you achieve a working prototype that is refined enough to be fool-proof, and if you want to produce/sell it - just do limited production or make from order for a price that you are ok with. It's funny because Phil Kubicki with his imagination, cred and experience pulled off a great design/device that freed a player from needing to transcribe on the fly once 'dropped' into D and it still is the only one out there.
     
  18. KisekaeVIM

    KisekaeVIM

    Aug 12, 2012
    New York
    Cut the headstcok to the shape and drilled tuner holes

    t7-2.jpg


    Put the additional low frets. If the fret at the nut position is called zero fret,
    should I call the others -1, and -2 fret?
    Slots for the fret and nut were done by this mini milling machine Proxxon MF70.

    t7-3.jpg

    --> JIO
    I saw your new capo on this thread;
    Classical drop-D extension focused build

    I don't know how it works but that looks very nice and solid!
     
    JIO, Matt Liebenau and Eli_Kyiv like this.
  19. JIO

    JIO Gold Supporting Member Commercial User

    Jun 30, 2010
    The Mission SF/CA
    musician/artist/owner - Gildaxe
    :) Thanks! Works as I had hoped and with intended 'on-the-fly' ease. (via thumb and one simple movement, even while playing)

    Looking forward to see yours resolved. :thumbsup:
     
  20. JIO

    JIO Gold Supporting Member Commercial User

    Jun 30, 2010
    The Mission SF/CA
    musician/artist/owner - Gildaxe
    fox-hee-jpg.jpg
    What am I doing?
    My plan was to wind the string this way!!

    t06-05-jpg.jpg

    ...too late..i didn't have to put that big bevel......

    That's just part of developing a prototype... trial and error. ;) The next version will be that much better.
     
    T_Bone_TL, Beej, wraub and 2 others like this.
  21. Primary

    Primary TB Assistant

    Here are some related products that TB members are talking about. Clicking on a product will take you to TB’s partner, Primary, where you can find links to TB discussions about these products.

     
    Jan 21, 2021

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