diff --git a/mods/README.md b/mods/README.md
index 7c9ed6c..1d18e2f 100644
--- a/mods/README.md
+++ b/mods/README.md
@@ -22,6 +22,7 @@ In this folder you'll find the FreeCAD, STEP and STL files for modifications tha
 
 <br/>
 
+
 ## End Effectors
 
 ### User-designed tools and end effectors for Thor
@@ -33,4 +34,17 @@ In this folder you'll find the FreeCAD, STEP and STL files for modifications tha
 
 <br/>
 
+## Tolerances and different hardware
+
+### Modifications to parts that improve print tolerance or serve to use components other than those listed in the BOM.
+
+
+<br/>
+
+* [se1exin](https://github.com/se1exin) 
+    * Art4BearingRing_5.98mm_Balls
+
+<br/>
+
+
 Thank you guys ;)
\ No newline at end of file
diff --git a/step/mods/Art4BearingRing_5.98mm_Balls.step b/mods/step/Art4BearingRing_5.98mm_Balls.step
similarity index 100%
rename from step/mods/Art4BearingRing_5.98mm_Balls.step
rename to mods/step/Art4BearingRing_5.98mm_Balls.step
diff --git a/stl/mods/Art4BearingRing_5.98mm_Balls.stl b/mods/stl/Art4BearingRing_5.98mm_Balls.stl
similarity index 100%
rename from stl/mods/Art4BearingRing_5.98mm_Balls.stl
rename to mods/stl/Art4BearingRing_5.98mm_Balls.stl