I'm probably preaching to the choir here, but just in case (for you or anyone else reading along), this is what the Truss base tool was created to do.  its like a special roof plane that stops trusses below from framing into roof plane above and visa versa.  Now getting the overframe framing correct is a whole different ball of wax.  It's a little time consuming, but one of my currently preferred methods for both ease and 3d accuracy is to just use trusses for all of it.    The overfra