Slowly Inching to Csla4.0. Question about the final step

From VS2008, SL3.0, .Net3.5 and Csla3.8.4, I have arrived at VS2010, SL4.0, .Net4.0 and Csla3.8.4

So far so good.  The App runs fine in my development server.  I have downloaded Csla4.0 and "installed" it.

I know about the issue of changing PropertyInto stuff from Private to Public, which I am starting on rigt now.  My Validation Rules have not been set up yet, nor authorization rules - I wanted to get to 4.0 before starting on those.

Is there any other preparatory change I need to make before "crossing over"?

Jav