I know, I know…
Here’s what I replied to you last time.
In a nutshell : forget about algorithmic convenience ; think “user needs” !
So here goes my official wish :
Please add a “tightness” option to the “ShrinkTrimmedSrf” ; tightness being the min. distance between the edges of the shrunk surface and the trimming curves.
That way, you will replace a tandem of “useless version + risky version” tools by one that is actually useful.
As a bonus, you could conveniently upgrade the Rhinocommon “ShrinkFaces” with that argument.