Single-ball string adapter for Steinberger Spirit

thingiverse

With strings installed: https://youtu.be/uKsCDRRQzng This is a prototype single-ball adapter for a Steinberger Spirit. I am using it to put Ernie Ball Beefy Slinky strings for downtuning to A# standard on my guitar, which typically requires specialist double-balled strings which are hard to find, expensive, and cannot be bought in unusual gauges. Screws are required (unsure of size, spares from many a year ago). This was actually the first draft and I'm quite pleasantly surprised that it seems to be staying in tune, but I don't know how stable it is likely to be long term. I would not be surprised if the combination of thin walls and self-tapping screws causes a crack in future. Installing the low A# string was difficult (not enough room in the corner in the tube. This is designed to locate into the truss rod/screw holes on the headstock stump, with string tension clamping it onto the end. Once the high and low string are in, it does not move. Screws are required, which clamp down onto the strings inside the adapter and stop them sliding out under tension. This was modelled after a "proper" single ball adapter such as: https://www.talkbass.com/attachments/img_0767-jpg.73406/ Be sure to print it out of PLA to make it [bioactive](https://www.youtube.com/watch?v=IUN7ZdsRAGQ) ;)