diff --git a/cyclonedx/model/bom.py b/cyclonedx/model/bom.py
index ee649366..4d030169 100644
--- a/cyclonedx/model/bom.py
+++ b/cyclonedx/model/bom.py
@@ -87,13 +87,8 @@ def __init__(
         self.properties = properties or []
         self.manufacturer = manufacturer
         self.lifecycles = lifecycles or []
-
+        # deprecated properties below
         self.manufacture = manufacture
-        if manufacture:
-            warn(
-                '`bom.metadata.manufacture` is deprecated from CycloneDX v1.6 onwards. '
-                'Please use `bom.metadata.component.manufacturer` instead.',
-                DeprecationWarning)
 
     @property
     @serializable.type_mapping(serializable.helpers.XsdDateTime)
@@ -214,6 +209,11 @@ def manufacture(self, manufacture: Optional[OrganizationalEntity]) -> None:
         @todo Based on https://github.com/CycloneDX/specification/issues/346,
               we should set this data on `.component.manufacturer`.
         """
+        if manufacture is not None:
+            warn(
+                '`bom.metadata.manufacture` is deprecated from CycloneDX v1.6 onwards. '
+                'Please use `bom.metadata.component.manufacturer` instead.',
+                DeprecationWarning)
         self._manufacture = manufacture
 
     @property
diff --git a/cyclonedx/model/component.py b/cyclonedx/model/component.py
index b0e24005..6737b39e 100644
--- a/cyclonedx/model/component.py
+++ b/cyclonedx/model/component.py
@@ -1010,11 +1010,9 @@ def __init__(
         self.supplier = supplier
         self.manufacturer = manufacturer
         self.authors = authors or []
-        self.author = author
         self.publisher = publisher
         self.group = group
         self.name = name
-        self.version = version
         self.description = description
         self.scope = scope
         self.hashes = hashes or []
@@ -1025,7 +1023,6 @@ def __init__(
         self.omnibor_ids = omnibor_ids or []
         self.swhids = swhids or []
         self.swid = swid
-        self.modified = modified
         self.pedigree = pedigree
         self.external_references = external_references or []
         self.properties = properties or []
@@ -1034,13 +1031,10 @@ def __init__(
         self.release_notes = release_notes
         self.crypto_properties = crypto_properties
         self.tags = tags or []
-
-        if modified:
-            warn('`.component.modified` is deprecated from CycloneDX v1.3 onwards. '
-                 'Please use `@.pedigree` instead.', DeprecationWarning)
-        if author:
-            warn('`.component.author` is deprecated from CycloneDX v1.6 onwards. '
-                 'Please use `@.authors` or `@.manufacturer` instead.', DeprecationWarning)
+        # spec-deprecated properties below
+        self.author = author
+        self.modified = modified
+        self.version = version
 
     @property
     @serializable.type_mapping(_ComponentTypeSerializationHelper)
@@ -1175,6 +1169,9 @@ def author(self) -> Optional[str]:
 
     @author.setter
     def author(self, author: Optional[str]) -> None:
+        if author is not None:
+            warn('`@.author` is deprecated from CycloneDX v1.6 onwards. '
+                 'Please use `@.authors` or `@.manufacturer` instead.', DeprecationWarning)
         self._author = author
 
     @property
@@ -1255,7 +1252,7 @@ def version(self) -> Optional[str]:
     @version.setter
     def version(self, version: Optional[str]) -> None:
         if version and len(version) > 1024:
-            warn('`.component.version`has a maximum length of 1024 from CycloneDX v1.6 onwards.', UserWarning)
+            warn('`@.version`has a maximum length of 1024 from CycloneDX v1.6 onwards.', UserWarning)
         self._version = version
 
     @property
@@ -1450,6 +1447,9 @@ def modified(self) -> bool:
 
     @modified.setter
     def modified(self, modified: bool) -> None:
+        if modified:
+            warn('`@.modified` is deprecated from CycloneDX v1.3 onwards. '
+                 'Please use `@.pedigree` instead.', DeprecationWarning)
         self._modified = modified
 
     @property
diff --git a/cyclonedx/model/tool.py b/cyclonedx/model/tool.py
index 6b56057f..904cd78b 100644
--- a/cyclonedx/model/tool.py
+++ b/cyclonedx/model/tool.py
@@ -203,12 +203,9 @@ def __init__(
         # Deprecated since v1.5
         tools: Optional[Iterable[Tool]] = None
     ) -> None:
-        if tools:
-            warn('`@.tools` is deprecated from CycloneDX v1.5 onwards. '
-                 'Please use `@.components` and `@.services` instead.',
-                 DeprecationWarning)
         self.components = components or ()
         self.services = services or ()
+        # spec-deprecated properties below
         self.tools = tools or ()
 
     @property
@@ -241,6 +238,10 @@ def tools(self) -> 'SortedSet[Tool]':
 
     @tools.setter
     def tools(self, tools: Iterable[Tool]) -> None:
+        if tools:
+            warn('`@.tools` is deprecated from CycloneDX v1.5 onwards. '
+                 'Please use `@.components` and `@.services` instead.',
+                 DeprecationWarning)
         self._tools = SortedSet(tools)
 
     def __len__(self) -> int: