Is it possible to completely isolate sub-assemblies inSolidWorks, that is, change components or sub-assemblies in onemain assembly without it affecting any other main assemblies? In"vector" CAD one need only save a file under a differentdesignation (name) and any other main assembly is "none the wiser".I have tryed to use the "save as copy" command but it does not seemto separate things in my data-base. I am very cautious abouttelling Solidworks it's "ok" to do this or that because I truly donot know what actually happens. Many of my Main assemblies are verycomplex and "altering" them by "accident" would prove disastrous.The nature of our "machinery" requires a great deal of re-use witheither minor or major variations which must not affect each other.What am I as a new user missing?

Regards,
JJSolidworksAssemblies