No, you have  more than 2 weeks  because the split introduced  in plan #1
would originally  be a dummy update  introducing no change in  the actual
code, just a few  changes in the messages. That is,  it would continue to
be compatible for several weeks after the change. I will in any case keep
you informed  of what is going  on, although not much  has happened since
survey #2 was closed.
 
  Eric