I am having trouble orienting an imported OBJ file.  When I get it close to a position in one photo, the OBJ isn't close in others.  The images are calibrated.  I suspect I need to be snapping to a place marker, but haven't figured that out yet.  
 
Could use some help! :-)

Hello,
 
  Yes the best to do, is to place first locators (at leasts 2 markers) on some corner or well identified places of your scene, and then use the PIN tool or the snap tool to place your OBJ.
 
Stef