Parametric Jaw Coupling with optional spider

This is a remix of modilion and zignig's jaw coupling as I wanted one without a spider and a hub for attaching to shafts with variable attachment options on either hub.
Any number of struts (=legs=teeth) can be selected rather than the 2 per hub of the parent designs.
If the coupling is created without a spider then the each hub is cut out so they mesh tightly.
The current four options for attaching the couplings are:-
1) A captured nut and bolt perpendicular to the attachment shaft (eg