diff --git a/Components.md b/Components.md
index dc0f3ea..dae4f4d 100644
--- a/Components.md
+++ b/Components.md
@@ -19,7 +19,9 @@ These components come with the mod and allow interacting with blocks or items of
 
 Adapter Block Components
 ------------------------
-These components are for blocks from vanilla Minecraft and other mods that become available when said blocks are placed next to an [[Adapter block|Blocks#adapter]].
+These components are for blocks from vanilla Minecraft and other mods that become available when said blocks are placed next to an [[Adapter block|Blocks#adapter]]. **Important**: these are only available when OpenComponents is also installed!
 - Vanilla: [[Command Block|Component/CommandBlock]]
 - Vanilla: [[Note Block|Component/NoteBlock]]
-- Redstone in Motion: [[Carriage Controller|Component/RedstoneInMotion]]
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+- Redstone in Motion: [[Carriage Controller|Component/RedstoneInMotion]]
+
+Note that OpenComponents adds support for *a lot* more blocks than these. There is no list (look at the sources for details), but some of the bigger supported mods are BuildCraft, IndustrialCraft2, Thermal Expansion and Applied Energistics.
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