Does anyone have any tips on how to prevent neck bow? I'm not really having any issues, it just ran through my head. I have a couple of thoughts and wanted to see if anyone else had something along the same lines.

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make sure you start with flat lumber.  wood has memory.  even if you sand it flat, it will more in the direction it was originally found.  also make sure the grain is perpendicular to the fret board, not parallel. cross grain, not flat grain is stronger.  Any good hard wood with an added fret board should stand up to years of use on 4 string CBGs.  

Hi Joe, the most stable necks I think are when timber is cut on the 1/4, grain running vertically top to bottom. If I cant get this, the photo shows what I do if the grain is too far off of vertical.

I've seen some rock maple electric guitar necks that are slab cut, grain going side to side, but generally guitar necks are cut on the 1/4.

  

Cheers Taff

Taffy hi, I ended up with the same idea for stable necks, with a thick fretboard as third part of the triangle.

Cheers, Moritz

Way to go!
Another contribution to a more stable neck is a good firm fret job.
Taff

That certainly helps Moritz.

Multiple pieces glued together will be stronger and less likely to warp than a one piece. Quarter sawn wood is better for protecting against neck ramping and back bow, but is likely to bow side to side unless it's glued in multiple pieces like these are or have a truss rod. Good call on the grain orientation and arranging the pieces accordingly.

Good job on those neck blanks Taff.

 When I made my 4 string Gas Can-jo, I used a through piece for the can to bolt the neck on. The neck is Red Oak with a Red Oak fretboard and the through piece is Red Oak. I used my drill with a Forstner bit to cut a 5/32" wide channel and 17/32" deep in the neck and through piece and glued a piece of 1/8" x 1/2" steel flat bar in them for a non-adjustable trussrod and stabilizer.

That may have been overkill and not needed. But I'm very sure that they will remain stable forever. I also think the steel added some sustain and better harmonics to the neck and through piece.

Are we going to start a thread on tonemetal? BwaHaHaHa

http://www.freeweekly.com/wp-content/uploads/2015/11/XRayBanjo.jpg

According to Ed Stilley circular saw blades are excellent tone metal...

You can get a good reverb thing going with some metal springs in your box. Shane did a video on that.

I tend to use metal for my bridges, I think it sounds better. I have a Fender Strat clone guitar that I changed the wimpy pot metal trem block out for a steel one and noticed a good change right off.

I guess it depends on where you put that saw blade as to whether you'd get any benefit from it. Instrument dynamic's can be very interesting. 

No, that wasn't my intent, but it's an idea. LOL

Paul, you were talking about a non adjustable truss rod, then JL was joking about tone metals. Ed Stilley did some guitars with a circular saw blade attached to such a truss rod, you will find an x-ray of one on

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