Thank you Brian,
I hava found and downloaded Two; “_VarPitchHelixExtremes” and “_VarPitchHelixVerbose”. Poking around I discovered what may be node! ... VarPitchHelix.nod it was by Barry-H in a post to you. (7777.374 In reply to 7777.373 ) form May2017.
I have not had a chance to play with anything yet.

I would truly love to be able to have a node or script that can construct a variable pitch helix that can follow a curved path as its main axis. Ideally the curved path is in the form a variable pitch helix. Like a macro in a macro or some such analogy.
Algorithmically speaking, do you think it’s possible?