diff --git a/README.md b/README.md
index 5f42b9f..e182e88 100644
--- a/README.md
+++ b/README.md
@@ -32,6 +32,14 @@ joint the projects community [Discord Server](https://discord.gg/maRvMVpa2Q).
 5. Upload firmware using VSCode with PlattformIO plugin
 6. Calibrate axis
 
+## NEW: Open Micro-Manipulator GUI
+To make testing and using the Open-Micro Manipulator easy and convenient a python control program with a graphical user interface is provided here: [Open Micro-Manipulator GUI](https://github.com/0x23/MicroManipulatorStepper)
+It has simple controlls to move the device around, while also displaying a live camera feed (e.g. from a microscope camer). Additional features, including a simple g-code runner and realtime mouse control (e.g. for Biology applications).
+
+<div style="display: flex;">
+    <img src="images/grain_manipulation_2.jpg" alt="Open Micro-Manipulator GUI" width="50%">
+</div>
+
 ## 🐍 Python-API
 
 The lightweight Python API handles all serial communication and provides convenient command execution and debug message printing.
diff --git a/documentation/bom/bom.md b/documentation/bom/bom.md
index 5fda7d5..411914a 100644
--- a/documentation/bom/bom.md
+++ b/documentation/bom/bom.md
@@ -5,7 +5,7 @@
 |------|-----|-------------|----------|----------------|-------|
 | Steel ball | 12 | Ø1.25 mm (0.05") | Precision G10 or better. Can be sourced from small ball bearings | |
 | PU stretch cord | 1 m | Ø1mm | e.g. "Stretch Magic" or "Magic String" | [Aliexpress](https://www.aliexpress.us/item/3256805953910514.html)| ![Pu strech cord](images/PU_StretchCord.png)|
-| Neodym Cylinder Magnet | 70 | Ø3mm h=4 mm | N42 Grade | [Ebay Link](https://www.ebay.de/itm/365333642187?var=635110190027)|
+| Neodym Cylinder Magnet | 70 | Ø3mm h=5 mm | N52 Grade | [Ebay Link]()|
 | Brass Pipe | 1 m | OD=Ø2mm ID=Ø1 mm |  | [Amazon](https://a.co/d/1pRFmtf)| ![Brass Pipe](images/BrassPipe.png)|
 | M2 Screw | 12 | M2×12 mm, Countersunk |  | |
 | M3 Grub Screw | 6 | M3×4 |  | |