About 2.5 years ago we had both Solidworks and at the time Wildfire 3. I asked SolidWorks and PTC if either of their PDM systems could house the other's files. PTC said yes, SolidWorks said they'd research it and get back to me. SolidWorks came back and said it can house PTC files but ones which have been sunset rather than being activly developed. I asked PTC if they have any clients using Windchill to house active SolildWorks files and they didn't provide any. At that point we stopped pursuing the notion of having one PDM system house files for CAD platforms. I am very interested in how your migration comes along and hope that you report back once you stabilize after the disruption.