Has any one had the experience where you modify a sub assembly and have it working in a new project. Create several other new projects and have it work as it should then have another user create a new project and it revert back to what it was pre modification.  Also are there supposed to be many Carcass base sub assemblies?  I have a LOT of several assemblies, and it is growing.  ALSO it seems as though the save to library option for the sub assemblies does not work al the time.  Whats going on?