So right now I am having an issue with my JPipes plugin where after a restart, the pipes connected to a quarry or pump jack disappear. What I found: When I load the plugin and search for the StorageContainers on the MiningQuarry using "BaseNetworkable.serverEntities.Find(id)", It returns null. And this only happens after a full restart. I found that the MiningQuarry has SpawnChildEntities() which spawns it's fuelstorage and hopper StorageContainers. So if there was a hook for when the server loads the childprefabs, then I can load my plugin on it instead of OnServerInitialized().