Version 1.2 contains significant improvements in quality, stability, and performance. This was made possible because it is based on the next generation of LGS 3D geometric constraint solving software component recently released by LEDAS. The new version generates solutions that users would expect to see as outcomes. When users now modify the parameters of driving dimensions, most edges and faces remain unchanged; the only ones to change are those needed to satisfy the new parameter values. In addition, the time to solve constraints has been significantly reduced, with the Driving Dimensions plug-in now up to ten times faster than the previous version on large models.