I’m still working out how to do a vertex as I wrote in my new years resolutions. But while looking for videos to help explain where I might be going wrong, I found a new category of tricks called j-sliding?
J-SLIDING is a new style of juggling with diabolo,
that enables you to do more tricks.
Its not quite the shift of the vertex before this, or the suicide before that and the grind before that. But interesting move forward regardless.