This is a more responsible use of this endangered material, especially because the ebony used is recycled from old bass fingerboards. The extension uses a wheel with bearings to take the pressure of the string over the top for ease of tuning. The maple is fitted to the scroll precisely, strengthening the pegbox, where the top of the strings are anchored. This also improves the sound of the bass. I never cut the bass scroll to install an extension.
Individual capos are available if stops for other notes are desired.
The entire addition adds little extra weight and impacts minimally on the original structure of the instrument. All stops close without the player having to hold down the string. I have developed my extensions over twenty plus years. The thumb rest on the pegbox side of the extension gives the player a comfortable place to finger the added notes but leaves plenty of room to change strings. Pictured on the right is the C extension mounted for testing before varnish and capo installations.