diff --git a/3d-printing/files/gcode/info.md b/3d-printing/files/gcode/info.md
index 903ac73..15355f7 100644
--- a/3d-printing/files/gcode/info.md
+++ b/3d-printing/files/gcode/info.md
@@ -1,2 +1,7 @@
 # 3D printing.
-This files was printed in PLA,  on an  ultimaker 3 with 0.8  Nozzle. 
\ No newline at end of file
+This files was printed in PLA,  on an  ultimaker 3 with 0.8  Nozzle. 
+
+# preparation for use 
+take a drill and drill into the wholes the tall nossle decrease accuracy.  
+this steps would fix it.
+you can use a knive too if the movement sensors don't fit the holes propaly.
\ No newline at end of file