https://forums.autodesk.com/t5/inventor-forum/subtracting-one-solid-from-another-in-an-assembly/m-p/5501470#M386543 <P>Edit the file you wish to trim in the context of the assembly.</P> <P>Use the Copy Object tool to copy (usually as Surface Body) the trimming geometry from other part(s).</P> <P>Then Sculpt or Split to trim the part.</P> <P>&nbsp;</P> <P>another option would be to use the technique that is identical to AutoCAD - multi-body solids modeling.</P> <P>&nbsp;</P> <P>Attach your assembly here (only need two parts to demonstrate).</P> Tue, 10 Feb 2015 11:34:18 GMT JDMather 2015-02-10T11:34:18Z