Hi, I have an approved i140 with my current employer and my PD is July 2014. I have been working for the same client for around 2 years (PERM and i140 for this location/client only). Now, because of some policy changes, my client prefers to hire me on H1B and willing to sponsor my GC. What are the implications for changing the job at this point of time and if somehow my H1B transfer to the client fails, can I go back to my current employer without new H1? Regards.