
Setting JPanels to the maximum size of JTabbedPane

Is what I have so far, the thing I really want to get done right now is to get the damned JPanel residing within the right JTabbedPane's tab to size properly so that when I want to put components in the supplied component arguments will work correctly, but for the life of me I can't figure it out.
So far the only thing I've applied directly to the container is
Code:
setLayout(new MigLayout("insets 5", "grow,fill"));
.... Not so top priority anymore, I skated around it by using setLayout(new MigLayout("", "[grow, fill]")); and then a sub-jpanel that was added, then all the components thrown into that to be sized properly.
Or.. Not? It only seems to feel like growing Y-Axis wise rather then both as I specified for some reason.