===== How do I know if the overlays "worked"? =====

To verify that method overlays were used in your simulation, open the run output browser.  At the replication level, go the Replication Information tab, and look at the Sim Version field.  If method overlays were used, a "//- overlays//" string will be appended to the sim version.

Additionally, the "Debug Overlays V00" instrument will show whether the overlays were successfully applied and in what order, or the reason they failed.