diff --git a/archivebox/builtin_plugins/singlefile/apps.py b/archivebox/builtin_plugins/singlefile/apps.py
index 54e6cb2d..6fcc5051 100644
--- a/archivebox/builtin_plugins/singlefile/apps.py
+++ b/archivebox/builtin_plugins/singlefile/apps.py
@@ -20,7 +20,7 @@ from plugantic.base_hook import BaseHook
 
 # Depends on Other Plugins:
 from builtin_plugins.npm.apps import SYS_NPM_BINPROVIDER, LIB_NPM_BINPROVIDER
-
+from builtin_plugins.base.apps import CORE_CONFIG
 
 ###################### Config ##########################
 
@@ -33,12 +33,11 @@ class SinglefileToggleConfigs(BaseConfigSet):
 class SinglefileOptionsConfigs(BaseConfigSet):
     section: ClassVar[ConfigSectionName] = 'ARCHIVE_METHOD_OPTIONS'
 
-    # loaded from shared config
-    SINGLEFILE_USER_AGENT: str = Field(default='', alias='USER_AGENT')
-    SINGLEFILE_TIMEOUT: int = Field(default=60, alias='TIMEOUT')
-    SINGLEFILE_CHECK_SSL_VALIDITY: bool = Field(default=True, alias='CHECK_SSL_VALIDITY')
-    SINGLEFILE_RESTRICT_FILE_NAMES: str = Field(default='windows', alias='RESTRICT_FILE_NAMES')
-    SINGLEFILE_COOKIES_FILE: Optional[Path] = Field(default=None, alias='COOKIES_FILE')
+    SINGLEFILE_USER_AGENT: str              = Field(default=lambda: CORE_CONFIG.USER_AGENT)
+    SINGLEFILE_TIMEOUT: int                 = Field(default=lambda: CORE_CONFIG.TIMEOUT)
+    SINGLEFILE_CHECK_SSL_VALIDITY: bool     = Field(default=lambda: CORE_CONFIG.CHECK_SSL_VALIDITY)
+    SINGLEFILE_RESTRICT_FILE_NAMES: str     = Field(default=lambda: CORE_CONFIG.RESTRICT_FILE_NAMES)
+    SINGLEFILE_COOKIES_FILE: Optional[Path] = Field(default=lambda: CORE_CONFIG.COOKIES_FILE)
 
 
 class SinglefileDependencyConfigs(BaseConfigSet):
diff --git a/archivebox/plugantic/base_configset.py b/archivebox/plugantic/base_configset.py
index f1631886..09d6fbfa 100644
--- a/archivebox/plugantic/base_configset.py
+++ b/archivebox/plugantic/base_configset.py
@@ -201,18 +201,21 @@ class BaseConfigSet(ArchiveBoxBaseConfig, BaseHook):      # type: ignore[type-ar
     def register(self, settings, parent_plugin=None):
         # self._plugin = parent_plugin                                      # for debugging only, never rely on this!
 
-        settings.FLAT_CONFIG = getattr(settings, "FLAT_CONFIG", None) or benedict({})
+        # settings.FLAT_CONFIG = benedict(getattr(settings, "FLAT_CONFIG", settings.CONFIG))
+        # # pass FLAT_CONFIG so far into our config model to load it
+        # loaded_config = self.__class__(**settings.FLAT_CONFIG)
+        # # then dump our parsed config back into FLAT_CONFIG for the next plugin to use
+        # settings.FLAT_CONFIG.merge(loaded_config.model_dump(include=set(self.model_fields.keys())))
+        
         settings.CONFIGS = getattr(settings, "CONFIGS", None) or benedict({})
-        
-        # pass FLAT_CONFIG so far into our config model to load it
-        loaded_config = self.__class__(**settings.FLAT_CONFIG)
-        # then dump our parsed config back into FLAT_CONFIG for the next plugin to use
-        settings.FLAT_CONFIG.merge(loaded_config.model_dump())
-        
-        settings.CONFIGS[self.id] = loaded_config
+        settings.CONFIGS[self.id] = self
+        self._original_id = id(self)
 
         super().register(settings, parent_plugin=parent_plugin)
 
+    # def ready(self, settings):
+    #     # reload config from environment, in case it's been changed by any other plugins
+    #     self.__init__()
 
 
 # class WgetToggleConfig(ConfigSet):