IIMN, the reason for the change in the planned layout at Grand St in the first place was to avoid the underpinning of the park in the area. In another discussion here, someone mentioned that avoiding the underpinning of Central Park was the reason for the double-level layout of CPW south of 110 St. That said, I think there is a little bit of flexibility since there are no plans to use the existing tunnels in Chinatown for revenue service. Either way, we have to remember that we're still aways from this happening, especially given the current political climate. Optimistically we are 10 years away from Phase 2. At the current rate of things, many of us probably won't even see this part of SAS open.