Modify SubD by Offseting Single SubD Edge?

Hi,

Similar to ‘Slide’ command, I am looking for a way to Offset an edge instead. (not the curve, I mean actually modifying the SubD).

I believe the current version of Rhino lacks this particular tool. I’m curious about potential alternatives and whether there is a possibility to develop such function in the future.

_Scale or _Align ToCurve

Align to curve is not ideal but it comes close to it, thank you.