Equidistant stone

Good evening ,
I am trying to make a pavè of brilliants and I would like to be able to put the stones equidistant, maybe even of different sizes, but I can’t. Is there a system with rhino 6 or rhino 8 (without wanting to use grasshopper) thank you very much everyone. Attached rhino file
elmetto half prongs (ext.prongs) 03 per rh.3dm (12.2 MB)

what do you mean by “equidistant” ?
the space in between stones of different sizes ?
or the distances of the centers ?

you want a circle-Packing on a curved surface with a single, constant radius ?

you are using flowAlongSrf with history at the moment - which is already quite nice workflow.
to stepwise find a nice solution:
start moving 5mm steps, then 2mm steps, then 1mm, 0.5, 0.2, 0.1, 0.05, 0.02, …
(this is already an algorithm ;-D)

and

… well yes - as you were afraid there is a lot of grasshopper stuff arround:

maybe also

yes I want :
a circle-Packing on a curved surface with a single, constant radius ?
I’ll follow your advise …
thank you,
Mirco