Amos Diagrams consider the (equivalent) models of a Lag(2) autoregressive process, a single superfactor, oblique factors, and a tau-equivalent state-trait model. Multigroup analysis shows tests of invariance tests appropriate for covariance data, and JuddMilburgMGClean is an example of a parapared diagram for use in the multi-group generation tool. (Note, as shown, the researcher will have to make assumptions across times or groups to identify the model.)