OK That works! :)
That was separated step by step "Workflow" indeed! If you miss a little step that it's ruined.
(and i took the node Selected so no need to give a particular name (for the moment of this very sensitive exploration :D

Just now rest to find where and how put a slider! :)

Found : I am a little genious! *<:O)

(I don't want imagine the background of the coding part of all that! :)
Thanks to the genious coders who permits these crazzy things!
Bravo!





and of course in French! ;)