interested in an Arca Swiss field type camera (compact monorail with full movements), Technikardan or similar camera / rig. I love my super affordable Calumet 4x5 and find that my Zone VI is not used as much-I need the precision of a monorail. I'm looking for a camera that offers monorail advantages in a more compact package. Willing to trade the Zone VI if trade value is reasonable. Thanks for looking and helping on this one.