diff --git a/printer_mods/midikeyboard/MatchstickDiffuser/CAD/Rainbow on a matchstick - 158mm v5.f3d b/printer_mods/midikeyboard/MatchstickDiffuser/CAD/Rainbow on a matchstick - 158mm v5.f3d
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Binary files /dev/null and b/printer_mods/midikeyboard/MatchstickDiffuser/CAD/Rainbow on a matchstick - 158mm v5.f3d differ
diff --git a/printer_mods/midikeyboard/MatchstickDiffuser/CAD/Rainbow on a matchstick - 158mm v5.step b/printer_mods/midikeyboard/MatchstickDiffuser/CAD/Rainbow on a matchstick - 158mm v5.step
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diff --git a/printer_mods/midikeyboard/MatchstickDiffuser/Images/01.png b/printer_mods/midikeyboard/MatchstickDiffuser/Images/01.png
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diff --git a/printer_mods/midikeyboard/MatchstickDiffuser/Images/02.png b/printer_mods/midikeyboard/MatchstickDiffuser/Images/02.png
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index 000000000..888b126ef
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diff --git a/printer_mods/midikeyboard/MatchstickDiffuser/README.md b/printer_mods/midikeyboard/MatchstickDiffuser/README.md
new file mode 100644
index 000000000..4e336c4d4
--- /dev/null
+++ b/printer_mods/midikeyboard/MatchstickDiffuser/README.md
@@ -0,0 +1,30 @@
+# matchstick-diffuser
+
+## Features
+
+- Designed for 158mm "Rainbow on a Matchstick" LED PCB.
+- Two assembly options: press-fit or screw-mounted.
+- Printable on 120x120 bed
+
+## Design properties
+
+- Designed using 0.2mm increments.
+- Diffuser thickness of 0.8mm (4 layers)
+- Wall thickness of 1mm.
+
+
+
+### Press-Fit Assembly
+
+1. Identify the top and bottom halves of the diffuser.
+2. While the LED PCB is installed in the extrusion, carefully press the top half onto the PCB, ensuring a snug fit.
+3. Align the bottom half.
+4. Verify alignment by checking the back side of the PCB. Ensure that the printed parts are flush with the PCB surface.
+
+### Screw-Mounted Assembly
+
+1. Identify the top and bottom halves of the diffuser.
+2. With the LED PCB in the extrusion, place the diffuser around the PCB.
+3. Align the screw holes on the diffuser with the corresponding holes on the extrusion.
+4. Securely attach the diffuser using the provided screws and a screwdriver.
+5. Verify alignment by checking the back side of the PCB. Ensure that the printed parts are flush with the PCB surface.
diff --git a/printer_mods/midikeyboard/MatchstickDiffuser/STL/Holes/holes 0.8mm diffuser.stl b/printer_mods/midikeyboard/MatchstickDiffuser/STL/Holes/holes 0.8mm diffuser.stl
new file mode 100644
index 000000000..748d7e0fa
Binary files /dev/null and b/printer_mods/midikeyboard/MatchstickDiffuser/STL/Holes/holes 0.8mm diffuser.stl differ
diff --git a/printer_mods/midikeyboard/MatchstickDiffuser/STL/Holes/holes 1.2mm diffuser.stl b/printer_mods/midikeyboard/MatchstickDiffuser/STL/Holes/holes 1.2mm diffuser.stl
new file mode 100644
index 000000000..a1845cfa9
Binary files /dev/null and b/printer_mods/midikeyboard/MatchstickDiffuser/STL/Holes/holes 1.2mm diffuser.stl differ
diff --git a/printer_mods/midikeyboard/MatchstickDiffuser/STL/Holes/holes 1.6mm diffuser.stl b/printer_mods/midikeyboard/MatchstickDiffuser/STL/Holes/holes 1.6mm diffuser.stl
new file mode 100644
index 000000000..d01ee2f38
Binary files /dev/null and b/printer_mods/midikeyboard/MatchstickDiffuser/STL/Holes/holes 1.6mm diffuser.stl differ
diff --git a/printer_mods/midikeyboard/MatchstickDiffuser/STL/Press-fit/Press-fit 0.8mm diffuser.stl b/printer_mods/midikeyboard/MatchstickDiffuser/STL/Press-fit/Press-fit 0.8mm diffuser.stl
new file mode 100644
index 000000000..63a674a60
Binary files /dev/null and b/printer_mods/midikeyboard/MatchstickDiffuser/STL/Press-fit/Press-fit 0.8mm diffuser.stl differ
diff --git a/printer_mods/midikeyboard/MatchstickDiffuser/STL/Press-fit/Press-fit 1.2mm diffuser.stl b/printer_mods/midikeyboard/MatchstickDiffuser/STL/Press-fit/Press-fit 1.2mm diffuser.stl
new file mode 100644
index 000000000..b1d20725d
Binary files /dev/null and b/printer_mods/midikeyboard/MatchstickDiffuser/STL/Press-fit/Press-fit 1.2mm diffuser.stl differ
diff --git a/printer_mods/midikeyboard/MatchstickDiffuser/STL/Press-fit/Press-fit 1.6mm diffuser.stl b/printer_mods/midikeyboard/MatchstickDiffuser/STL/Press-fit/Press-fit 1.6mm diffuser.stl
new file mode 100644
index 000000000..f9786b469
Binary files /dev/null and b/printer_mods/midikeyboard/MatchstickDiffuser/STL/Press-fit/Press-fit 1.6mm diffuser.stl differ