"Sometimes difficult to add extra cuts to an existing cutout, if revision change is required, without the whole part failing."
I am yet to see this happen, even working with 4000+ part assemblies. Could be a problem with the work flow.
Actually I checked it after or why would I say it...
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Stew, AICP
Inventor Professional 2013, Autodesk Simulation Multiphysics 2013
Windows 7 x64 Core i7 32GB Ram FX2000