Tone Ninja?

[Chuck H]

Well I've always just used bone because I know it works well and I never like guessing games. But I haven't worked nuts or acoustic saddles since before you had to buy these things from brick and mortar stores! So acquiring different materials would have meant placing an order with a shop. Distinctly more trouble than placing an order on line. At the time I was in the bay area of California and there were four respected guitar repair shops that all had bone blanks for nuts and saddles. Graphite was a popular product at the time, as was Corian but I never tried them since the repair guys and luthiers I trusted all used bone.

And I can sympathize with your frustration shaping the nut. I never had much trouble with saddles, even compensated bone saddles. But shaping nuts is HARD. You have to match the seating profile, space the slots accurately, cut the slots to the right width, angle (actually two or even slightly curved), the bottom of the slots must be right to avoid premature wear and the depth of the slots must be perfect (same as a zero fret on the high E and almost unnoticeably higher than that on the low E). And then the top should be trimmed to allow just under half the string diameter to be above the slots. Get even one thing wrong and it will ruin your sleep until you fix it. When I'm shaping a nut I buy three blanks and never use less than two.

[Helmholtz]

From the Tone Ninja page:
"Tone Ninja nuts are manufactured using an engineered polymer that has a very high and consistent density that transmits more of the vibration of the strings to the neck of the guitar."

That statement reveals a serious misconception of guitar/vibrational physics.

The purpose of the nut (as well as the bridge) is to reflect vibration back into the string and not transfer it to the neck.
It's somewhat comparable to a ball being reflected from a wall. If the wall is flexible it takes energy fom the ball.

Any vibrational energy that is transferred to the neck gets absorbed and has no chance to re-enter the string, so is lost for sound (PUs can only "see" string vibration).
As a result tone and sustain will suffer - at least with open strings.

The harder the nut, the better it reflects high frequencies, so sounds brighter.

Dunno the Ninja nuts. Only use bone.
Don't think the nut has much influence on fretted notes.

[SoulFetish]

I've been experimenting with nut materials on my guitar. Of course, I did not mean to end up in this experiment, nor did I want to, but here I am.

When I was deciding on all the specs and parts for my tele build, I decided to go with a pre-slotted tusq XL. It was too short, the nut slots too wide for the bevel on this particular neck, and the sound of the open strings has a noticeably damped resonance.
I'm too obsessive about the action and speed of my necks to not have everything really dialed in, so I've come to realize that I need to custom cut the nut slots, and shape the nut from a blank. I'm probably going to use bone, because I installed one this past week and was able to test it out. I couldn't believe that I would notice as drastic a difference to the tusq XL as I did. I was so close to having this filed perfectly, but cut the D slot too deep. So, I cussed a lot, spent a several hours researching methods of repair, and have come to accept that I need to start over to do it "right".

Anyways, I've probably going to stick with bone as my nut material, but I was wondering if anyone has had any experience with "Tone Ninja's" nut material?
https://www.toneninja.com/guitar-nuts
They use a glass reinforced acetal copolymer, which sounds legit as a nut material. I read the Wikipedia page on it, so I'm now an expert on material. I bought a blank, as well as a bone nut blank to try out.

Let me just finally say this: It's bothering the hell out of me to have to buy anything from a company with the name "Tone Ninja". "Tone Ninja"?? Acetal Copolymer MaGee would have been a better name, ACM.
It's so bad, I will actually feel some embarrassment saying it out loud if I like it and the topic of the tele's nut ever comes up.