Carbon fiber D-tube for mandocello neck reinforcement

[Bernie Daniel]

This fellow is building some interesting instruments. Do not know if his work has come up on this forum before or not?

However, I like his idea for stabilizing a mandocello neck -- strong and light weight. Some interesting discussion on how close to the nut and dovetail to run the rod in neck.

[Beanzy]

Here’s the neck on my Davidson mandolin being prepped

[j. condino]

A mandocello neck is large enough that it is nice to have the ability to adjust it. They make the same thing with an adjustable truss rod inside it. Those big fixed D tubes work best for upright basses; I've installed dozens of them. It is important to remember that not all carbon fiber is engineered with the same properties: some express movement only in specific directions. You can easily overdue it and create a too rigid brick and then wind up having to go back and add relief to the system.