diff --git a/SD-image/gcodes-MiniKossel/EscherLizard.gcode b/SD-image/gcodes-MiniKossel/EscherLizard.gcode
index c204503..01b1fb6 100644
--- a/SD-image/gcodes-MiniKossel/EscherLizard.gcode
+++ b/SD-image/gcodes-MiniKossel/EscherLizard.gcode
@@ -14,7 +14,7 @@ G90 ; use absolute coordinates
 M83 ; use relative distances for extrusion
 G1 Z10 F500 ; lift nozzle
 G1 X-85 Y0 F4000; Go to wait for warm position
-T1
+T0
 M116; Wait for all temperatures
 G1 E4 F500
 M109 S195 ; wait for temperature to be reached
diff --git a/SD-image/gcodes-MiniKossel/HollowDodecahedron.gcode b/SD-image/gcodes-MiniKossel/HollowDodecahedron.gcode
index 3f4b1e8..e0385cf 100644
--- a/SD-image/gcodes-MiniKossel/HollowDodecahedron.gcode
+++ b/SD-image/gcodes-MiniKossel/HollowDodecahedron.gcode
@@ -14,7 +14,7 @@ G90 ; use absolute coordinates
 M83 ; use relative distances for extrusion
 G1 Z10 F500 ; lift nozzle
 G1 X-85 Y0 F4000; Go to wait for warm position
-T1
+T0
 M116; Wait for all temperatures
 G1 E4 F500
 M109 S195 ; wait for temperature to be reached
diff --git a/SD-image/gcodes-Ormerod/coathook.g b/SD-image/gcodes-Ormerod/coathook.g
index 402cf45..5a5668d 100644
--- a/SD-image/gcodes-Ormerod/coathook.g
+++ b/SD-image/gcodes-Ormerod/coathook.g
@@ -25,7 +25,7 @@ G1 Z5 F200 ; lift nozzle
 G1 X2 Y50 F2000; Go to wait for warm position
 M116; Wait for all temperatures
 G10 P1 S185 R0 ; Set extruder temperature
-T1; Select extruder
+T0; Select extruder
 M116; Wait for all temperatures
 G1 F1800.000 E-4.00000
 G1 Z0.240 F3600.000
diff --git a/SD-image/gcodes-Ormerod/ormaxis.g b/SD-image/gcodes-Ormerod/ormaxis.g
index 65d2a1f..5656f00 100644
--- a/SD-image/gcodes-Ormerod/ormaxis.g
+++ b/SD-image/gcodes-Ormerod/ormaxis.g
@@ -25,7 +25,7 @@ G1 Z5 F200 ; lift nozzle
 G1 X2 Y50 F2000; Go to wait for warm position
 M116; Wait for all temperatures
 G10 P1 S185 R0 ; Set extruder temperature
-T1; Select extruder
+T0; Select extruder
 M116; Wait for all temperatures
 G1 F1800.000 E-4.00000
 G1 Z0.240 F3600.000
diff --git a/SD-image/gcodes-Ormerod/snowman.g b/SD-image/gcodes-Ormerod/snowman.g
index 452cf75..1257695 100644
--- a/SD-image/gcodes-Ormerod/snowman.g
+++ b/SD-image/gcodes-Ormerod/snowman.g
@@ -25,7 +25,7 @@ G1 Z5 F200 ; lift nozzle
 G1 X2 Y50 F2000; Go to wait for warm position
 M116; Wait for all temperatures
 G10 P1 S185 R0 ; Set extruder temperature
-T1; Select extruder
+T0; Select extruder
 M116; Wait for all temperatures
 G1 F1800.000 E-4.00000
 G1 Z0.240 F3600.000
diff --git a/SD-image/gcodes-Ormerod/whistle.g b/SD-image/gcodes-Ormerod/whistle.g
index b130826..60ee9a9 100644
--- a/SD-image/gcodes-Ormerod/whistle.g
+++ b/SD-image/gcodes-Ormerod/whistle.g
@@ -25,7 +25,7 @@ G1 Z5 F200 ; lift nozzle
 G1 X2 Y50 F2000; Go to wait for warm position
 M116; Wait for all temperatures
 G10 P1 S185 R0 ; Set extruder temperature
-T1; Select extruder
+T0; Select extruder
 M116; Wait for all temperatures
 G1 F1800.000 E-4.00000
 G1 Z0.240 F3600.000