I say this because Mentor Graphics has been recently acquired by Siemens PLM Software and work is underway to provide a very high degree of integration between the Mentor Graphics suite of products and applications and the MCAD products of Siemens, such as NX.
Now it is true that Siemens NX is a 'Open' system and that it's possible to interface Zuken tools with NX, but long term, the preferred route to go will be use the Mentor Graphics ECAD product sets wherever possible when it comes to the design of integrated mechanical/electrical, or 'Mechatronic', systems.