Basic Coding question

Hi folks-
New here, just learned that MV went Open Source a little while ago, thought I'd give it a look.

Am I right on these points:

Programming Client customization is done in Python (IronPython) using the client API unless I want to do source edits (using VS2010 in .NET) (plus XML for the UI layout)

Programming the Server customizations is done by building extensions/plugins for MARS using JAVA(compiled to JAR) or Python (looks like even if I go JAVA, some Python is always needed for registering the extensions and any messages), and if I want to mess with Server Source, it's in JAVA?

Just trying to get it all straight

That sounds about right.

The tools and the client core code are both in C#.