When a part is selected from the feature tree and "copied" into the assembly using the "Cntl+Mouse hold" process, what is the basis that calculates the "depth" at which the part enters the assembly.  I've done this several times only to find the part 3 miles back from the origin of the entire assembly.  Other times it's there in front of the other items in the assembly.  Is there any control as to the "depth" of which a part is placed by the software?