Vertex freeze - request

Hi, recently I'm making some modular rocks. I often tweak some big shapes with proportional move tool, but it also destroys my border vertex positions that are supposed to be 'pixel prefect' connected to segment next to it.
I simply with  I could freeze border vertices...

yes a feature i would like too, a pretty hackish work around is to just hide the parts you dont want effected by soft-selection, just go in face mode select the area you want to use soft selection on and use the hide unselected command.

Jose: Select some vertices, then View > Hide. Those vertices will be made invisible and you won't be able to select or modiy them unless you unhide them.

Thanks. This is perfect.