diff --git a/ROMFS/px4fmu_common/mixers/quad_+.main.mix b/ROMFS/px4fmu_common/mixers/quad_+.main.mix
index cd9a9cfab6..0341487d95 100644
--- a/ROMFS/px4fmu_common/mixers/quad_+.main.mix
+++ b/ROMFS/px4fmu_common/mixers/quad_+.main.mix
@@ -6,8 +6,7 @@ are mixed 100%.
 
 R: 4+ 10000 10000 10000 0
 
-
-Gimbal / payload mixer for last four channels
+Gimbal / payload mixer for last two channels
 -----------------------------------------------------
 
 M: 1
@@ -17,11 +16,3 @@ S: 0 4  10000  10000      0 -10000  10000
 M: 1
 O:      10000  10000      0 -10000  10000
 S: 0 5  10000  10000      0 -10000  10000
-
-M: 1
-O:      10000  10000      0 -10000  10000
-S: 0 6  10000  10000      0 -10000  10000
-
-M: 1
-O:      10000  10000      0 -10000  10000
-S: 0 7  10000  10000      0 -10000  10000
diff --git a/ROMFS/px4fmu_common/mixers/quad_h.main.mix b/ROMFS/px4fmu_common/mixers/quad_h.main.mix
index db5e730f2a..9ab09a4d84 100644
--- a/ROMFS/px4fmu_common/mixers/quad_h.main.mix
+++ b/ROMFS/px4fmu_common/mixers/quad_h.main.mix
@@ -6,7 +6,7 @@ are mixed 100%.
 
 R: 4h 10000 10000 10000 0
 
-Gimbal / payload mixer for last three channels
+Gimbal / payload mixer for last two channels
 -----------------------------------------------------
 
 M: 1
@@ -16,7 +16,3 @@ S: 0 4  10000  10000      0 -10000  10000
 M: 1
 O:      10000  10000      0 -10000  10000
 S: 0 5  10000  10000      0 -10000  10000
-
-M: 1
-O:      10000  10000      0 -10000  10000
-S: 0 6  10000  10000      0 -10000  10000
diff --git a/ROMFS/px4fmu_common/mixers/quad_v.main.mix b/ROMFS/px4fmu_common/mixers/quad_v.main.mix
index dd0b88b47b..5dcfb3afff 100644
--- a/ROMFS/px4fmu_common/mixers/quad_v.main.mix
+++ b/ROMFS/px4fmu_common/mixers/quad_v.main.mix
@@ -6,7 +6,7 @@ are mixed 100%.
 
 R: 4v 10000 10000 10000 0
 
-Gimbal / payload mixer for last three channels
+Gimbal / payload mixer for last two channels
 -----------------------------------------------------
 
 M: 1
@@ -16,7 +16,3 @@ S: 0 4  10000  10000      0 -10000  10000
 M: 1
 O:      10000  10000      0 -10000  10000
 S: 0 5  10000  10000      0 -10000  10000
-
-M: 1
-O:      10000  10000      0 -10000  10000
-S: 0 6  10000  10000      0 -10000  10000
diff --git a/ROMFS/px4fmu_common/mixers/quad_w.main.mix b/ROMFS/px4fmu_common/mixers/quad_w.main.mix
index 4062a341ad..0cf8ae58a3 100644
--- a/ROMFS/px4fmu_common/mixers/quad_w.main.mix
+++ b/ROMFS/px4fmu_common/mixers/quad_w.main.mix
@@ -5,7 +5,7 @@ This file defines a single mixer for a quadrotor with a wide configuration.  All
 
 R: 4w 10000 10000 10000 0
 
-Gimbal / payload mixer for last three channels
+Gimbal / payload mixer for last two channels
 -----------------------------------------------------
 
 M: 1
@@ -15,7 +15,3 @@ S: 0 4  10000  10000      0 -10000  10000
 M: 1
 O:      10000  10000      0 -10000  10000
 S: 0 5  10000  10000      0 -10000  10000
-
-M: 1
-O:      10000  10000      0 -10000  10000
-S: 0 6  10000  10000      0 -10000  10000
diff --git a/ROMFS/px4fmu_common/mixers/quad_x.main.mix b/ROMFS/px4fmu_common/mixers/quad_x.main.mix
index 3a5d07756e..05adb6f818 100644
--- a/ROMFS/px4fmu_common/mixers/quad_x.main.mix
+++ b/ROMFS/px4fmu_common/mixers/quad_x.main.mix
@@ -5,6 +5,3 @@ S: 0 4  10000  10000      0 -10000  10000
 M: 1
 O:      10000  10000      0 -10000  10000
 S: 0 5  10000  10000      0 -10000  10000
-M: 1
-O:      10000  10000      0 -10000  10000
-S: 0 6  10000  10000      0 -10000  10000