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--- a/0.3.md
+++ b/0.3.md
@@ -1,6 +1,8 @@
 for Minecraft 1.15 and 1.16 released on December 18th, 2020.  
 _"Enough. It's finally time."_
 
+Important note: extractors, transposers, and belt observers have been removed, funnel mechanics have been revised, and brass recipes were changed, which can break some machines from version 0.2.
+
 ### Additions
    - Entity Collision for all types of moving structures.
    - Mechanical Arms