Hi Yam,
Glad to hear it is useful.
Regarding the springing back - the things to adjust are the Strength and Limit(L) of the PlasticAnchor goal.
What the PlasticAnchor does is to make each point stick to a target location with a spring-like force, but if this spring is stretched far enough it drags the target location along with it.
This is necessary because without it elastic objects like the strip would always just return to their rest configuration.
It can’t be too strong relative to the EdgeLengths and EqualAngle goals that are keeping the mesh developable, or it would be able to stick the mesh in undevelopable configurations. Too weak though and the mesh will keep drifting back from where you drag it to.
Attached is a version with adjusted strengths.
developable_strip_igl2.gh (35.1 KB)