"Essentially all models are wrong. But some are useful." George Box
Our CLDs are always work in progress. The model is not the territory. The territory is always changing and we will continually seek to improve our system.
We craft an experiment (a project, an action) and we make it happen knowing that it may not work in the way we expected. In other words, our mental model could be wrong...
Pay attention to the system. It will "speak" to us.