I bought a Fat Finger many years ago. I never tested it out on any graphs or circuits, but to the ear I could never tell a difference. Best test is just to strum a chord and let it sustain out.
Just fitted the Fender Infinity to my bass and thought I'd done it wrong due to the amount of movement. Saw your video which confirms that's how they are. I don't like them, it feels like it's gonna drop off. 👍
The fat finger doesn't work but here's something that does and is cheaper. Attack a small aluminum dog bowl to the headstock' attach one in-between the rear strap button and body and the most important one.... Attach one in between the tone control knob and tone control pot. You can turn your solid body guitar into a tricone resonator guitar. What do you think' video?
I remember seeing the "Fatfinger" in the '90s ut instead of a clamp, I was a brass plate that was supposed to screw onto the back of the headstock. Sounds like a great way to get neckdive in an otherwise balanced guitar... I never bought one
Amperstand looks like a complete bust, which was my first thought when I saw it on their site. Def needs a redesign, and that "sticky" stuff being trusted to hold everything in place is 100% sketch. I see broken guitars and amps covered in beer. Take the "L" Fender