When we are taught relativity we never seem to be asked to consider how the configuration of objects in frames moving relative to ours actually got there. It just seems that we imply that is the way they always were and so an actual congruence measurement of direct comparison in the same frame was never made. If we physically transported the configuration of objects to our rest frame and measured them by direct comparison, could we guarantee the same result as applying the transformations of our measurements at a distance, or would the transportation profile make a difference. This leads on to the following question. If we transport a configuration of objects, presently at rest in our frame, to another inertial frame moving relative to us, and then return the configuration to rest in our frame, would the configuration return to its original dimensions in our frame no matter how the transportation was done. Or would the two transportations have to be exactly reciprocal with respect to each other. Matheinste.