Hi mir4ea,

> Michael could you pleas modify a bit script by adding ShrinkTrimmedSrf command after separate.

It's not going to work well for this particular case where you're trying to reconstruct the original shape, because after the ShrinkTrimmedSrf things like planes will not get extended when their outer boundaries are removed.

You can see what the effect would be by just running ShrinkTrimmedSrf on your selection before running the script command - if you run ShrinkTrimmedSrf on a filleted box for example all surfaces will be shrunk down exactly to their current boundaries and so removing the outer boundary won't extend the shape unlike what you're seeing now.

I mentioned ShrinkTrimmedSrf previously not because it was something to use for this kind of untrim operation, but just because it's related to the general topic of how trimmed surfaces work. It's almost sort of the opposite of what you're trying to do here though.

- Michael