OK, a word about the ‘Overlord Of Music’ brand locking nut for the Headless Guitar Kit (GK-SHS-40) that’s available for many in the UK and beyond:
The bridge is a ‘knock-off’ version of the Steinberger ‘R-Trem’, and it’s perfectly able and usable. I’ve been most impressed with it. However, the locking nut seems to be a different kettle of fish, and it took me a while to figure it out.
To make the guitar compatible with normal single-ball-end strings, ‘Overlord of Music’ have incorporated an ingenious system to keep the strings secure and in tune. Now, as there’s a normal type of locking nut used, it’s not quite strong enough to keep the ‘high e’ string in tune on it’s own – it slips and detunes far too easily. So, in the nut unit, there’s a series of small holes that you run each string through, before then tightening each with the grub screws on the end of the unit. It effectively clamps each string down – at right angles – through the end of the unit. The locking nut then does the rest of the load-bearing work.
Here you can see the string holes arrowed, with the grub screws clearly evident.
So, string goes over top nut, through hole, clamped with the grub screw, then string tuned. Then, and only then, are the locking nut clamps fastened and final tune-up performed.
Et voila! A very very cheap, yet perfectly usable floating, locking (DOUBLE locking!) tremolo system!