My model has been built with level datums that are different than the topo surface points. When I edit the toposurface, the points are all based 138' different than what they should be, but my level heads read correctly when I have things set to "shared" in Elevation Base. amd spot elevations read correctly when relative to "current level". Is there a way to leave the toposurface where it is relative to the rest of the model yet have the points reference change? I have tried relocating the project etc. but I get error messages saying things are trying to move in opposite directions from their constraints...HELP!