I have 4 models that I need to make drawings of.  There are only slight differences in them and I want to just "save as" one drawing and just keep "Replace Model" in the drawing views.  The problem is when the model in the drawing views are replaced everything gets slightly shifted.  To diagnosis the problem instead of replacing the model I just inserted a totally new view of the new model next to the old drawing view of the old model.  When I do "Horizontal Align by Origin" they line up perfectly but when I do "Horizontal Align by Center" this is where the slight shift is. What is the "Center" that Solidworks uses and can I change it so that all my centers are the same and make it easy to replace models?

Thanks in advance!