diff --git a/doc/changes/auxiliary/mr.839.1.md b/doc/changes/auxiliary/mr.839.1.md
new file mode 100644
index 000000000..d3a39d013
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+++ b/doc/changes/auxiliary/mr.839.1.md
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+util: added `u_device_2d_extents` and `u_setup_2d_extents_split_side_by_side` -
+this is hopefully to eliminate confusion: the FOV you had to give to
+`u_device_split_side_by_side` was just a dummy value, but some people thought
+it was the actual headset's FOV.
diff --git a/doc/changes/auxiliary/mr.839.2.md b/doc/changes/auxiliary/mr.839.2.md
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index 000000000..e506dc6e4
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+++ b/doc/changes/auxiliary/mr.839.2.md
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+math: Add `math_map_ranges` function, does the same thing as Arduino's `map`.
diff --git a/doc/changes/drivers/mr.839.md b/doc/changes/drivers/mr.839.md
new file mode 100644
index 000000000..dba1496e6
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+++ b/doc/changes/drivers/mr.839.md
@@ -0,0 +1,5 @@
+north_star:
+- Upstreams Moses Turner's "VIPD" distortion.
+- Fixes the FOV calc on the v1/3D distortion.
+- General improvement of code organization.
+- Improved JSON parsing.