I recently noticed that some of my fitting model VIs were excessively large on disk. It turns out that during debugging long ago I made the current values the default so I can run it standalone. This also meant that the data variant control contained a gigantic kernel matrix.
For some reason it is not obvious how to clear the variant (in order to be able to make the new value default and make the VI small again).
For example for the nonlinear fitting model templates, the data is not shown by default, obscuring the fact that it is the culprit for the excessive size. This also makes clearing the variant tedious (right-click...show data...select all data...delete...right-click...uncheck show data...).
IDEA: I propose a new menu entry: "Right-click...data operations...Clear Data" or similar.