The mini setback head was originally developed for the Liteville H-3.
However, it can also be used with any other NGS 2 seat post in order to reduce the offset of the setback seat post.
Additionally required for the conversoin from setback to mini setback: a titanium screw: https://www.eightpins.com/shop/produkt-39/
Frame size = seat post tube size
4-way scheme: Rotwild and Bulls
6-way scheme: Liteville and Ghost