Hello Pilou and willem.

@Pilou "...you can make your own parametric system"

Ok, this is true if applied to the things feasible with the "Project Elephant (or Node Editor)" or scripting in general, but I think that we have to be clear to give the right info to new users.

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Moi IS NOT a true "parametric" Cad. It simply doesn't have that feature.
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About this point I think that all should be clear :)

Ciao!