diff --git a/mcstas-comps/contrib/chopper-lib.ext b/mcstas-comps/contrib/chopper-lib.ext
index f316d4afc..34968a955 100644
--- a/mcstas-comps/contrib/chopper-lib.ext
+++ b/mcstas-comps/contrib/chopper-lib.ext
@@ -3,9 +3,9 @@
   "description": "Disk chopper timing from NeXus NXdisk_chopper descriptions, and ESS butterfly moderators with a masked or polygonal emission surface.",
   "homepage": "https://github.com/mcdotstar/mcstas-chopper-lib",
   "git": "https://github.com/mcdotstar/mcstas-chopper-lib.git",
-  "version": "v4.2.3",
+  "version": "v4.3.0",
   "license": "BSD-3-Clause",
-  "base": "https://raw.githubusercontent.com/mcdotstar/mcstas-chopper-lib/v4.2.3/",
+  "base": "https://raw.githubusercontent.com/mcdotstar/mcstas-chopper-lib/v4.3.0/",
   "files": [
     {
       "name": "NXdisk_chopper.comp",
diff --git a/mcstas-comps/examples/Tests_optics/Masked_ESS_butterfly_image/Masked_ESS_butterfly_image.ext b/mcstas-comps/examples/Tests_optics/Masked_ESS_butterfly_image/Masked_ESS_butterfly_image.ext
index 4479854e4..5cc0bd88a 100644
--- a/mcstas-comps/examples/Tests_optics/Masked_ESS_butterfly_image/Masked_ESS_butterfly_image.ext
+++ b/mcstas-comps/examples/Tests_optics/Masked_ESS_butterfly_image/Masked_ESS_butterfly_image.ext
@@ -2,11 +2,11 @@
   "name": "mcstas-chopper-lib",
   "homepage": "https://github.com/mcdotstar/mcstas-chopper-lib",
   "git": "https://github.com/mcdotstar/mcstas-chopper-lib.git",
-  "version": "v4.2.3",
+  "version": "v4.3.0",
   "license": "BSD-3-Clause",
   "archive": {
-    "url": "https://github.com/mcdotstar/mcstas-chopper-lib/archive/refs/tags/v4.2.3.tar.gz",
-    "sha256": "efa9baeb7e8dd2fc36e99bece89958dd2979afa0723fec1301eb91191789090d",
+    "url": "https://github.com/mcdotstar/mcstas-chopper-lib/archive/refs/tags/v4.3.0.tar.gz",
+    "sha256": "70d74198f5f4f6d4aefb34a5f3b3cc75e1ed5b6defb937fc60917d567d698709",
     "strip": 1
   },
   "files": [
diff --git a/mcstas-comps/examples/Tests_optics/NXdisk_chopper_display/NXdisk_chopper_display.ext b/mcstas-comps/examples/Tests_optics/NXdisk_chopper_display/NXdisk_chopper_display.ext
index 866379ea1..1eb712184 100644
--- a/mcstas-comps/examples/Tests_optics/NXdisk_chopper_display/NXdisk_chopper_display.ext
+++ b/mcstas-comps/examples/Tests_optics/NXdisk_chopper_display/NXdisk_chopper_display.ext
@@ -2,11 +2,11 @@
   "name": "mcstas-chopper-lib",
   "homepage": "https://github.com/mcdotstar/mcstas-chopper-lib",
   "git": "https://github.com/mcdotstar/mcstas-chopper-lib.git",
-  "version": "v4.2.3",
+  "version": "v4.3.0",
   "license": "BSD-3-Clause",
   "archive": {
-    "url": "https://github.com/mcdotstar/mcstas-chopper-lib/archive/refs/tags/v4.2.3.tar.gz",
-    "sha256": "efa9baeb7e8dd2fc36e99bece89958dd2979afa0723fec1301eb91191789090d",
+    "url": "https://github.com/mcdotstar/mcstas-chopper-lib/archive/refs/tags/v4.3.0.tar.gz",
+    "sha256": "70d74198f5f4f6d4aefb34a5f3b3cc75e1ed5b6defb937fc60917d567d698709",
     "strip": 1
   },
   "files": [
diff --git a/mcstas-comps/examples/Tests_optics/NXdisk_chopper_image/NXdisk_chopper_image.ext b/mcstas-comps/examples/Tests_optics/NXdisk_chopper_image/NXdisk_chopper_image.ext
index 2f6e9ceb4..e60b5f3e6 100644
--- a/mcstas-comps/examples/Tests_optics/NXdisk_chopper_image/NXdisk_chopper_image.ext
+++ b/mcstas-comps/examples/Tests_optics/NXdisk_chopper_image/NXdisk_chopper_image.ext
@@ -2,11 +2,11 @@
   "name": "mcstas-chopper-lib",
   "homepage": "https://github.com/mcdotstar/mcstas-chopper-lib",
   "git": "https://github.com/mcdotstar/mcstas-chopper-lib.git",
-  "version": "v4.2.3",
+  "version": "v4.3.0",
   "license": "BSD-3-Clause",
   "archive": {
-    "url": "https://github.com/mcdotstar/mcstas-chopper-lib/archive/refs/tags/v4.2.3.tar.gz",
-    "sha256": "efa9baeb7e8dd2fc36e99bece89958dd2979afa0723fec1301eb91191789090d",
+    "url": "https://github.com/mcdotstar/mcstas-chopper-lib/archive/refs/tags/v4.3.0.tar.gz",
+    "sha256": "70d74198f5f4f6d4aefb34a5f3b3cc75e1ed5b6defb937fc60917d567d698709",
     "strip": 1
   },
   "files": [
diff --git a/mcstas-comps/examples/Tests_optics/Polygon_ESS_butterfly_image/Polygon_ESS_butterfly_image.ext b/mcstas-comps/examples/Tests_optics/Polygon_ESS_butterfly_image/Polygon_ESS_butterfly_image.ext
index 6ed12216c..3172c056c 100644
--- a/mcstas-comps/examples/Tests_optics/Polygon_ESS_butterfly_image/Polygon_ESS_butterfly_image.ext
+++ b/mcstas-comps/examples/Tests_optics/Polygon_ESS_butterfly_image/Polygon_ESS_butterfly_image.ext
@@ -2,11 +2,11 @@
   "name": "mcstas-chopper-lib",
   "homepage": "https://github.com/mcdotstar/mcstas-chopper-lib",
   "git": "https://github.com/mcdotstar/mcstas-chopper-lib.git",
-  "version": "v4.2.3",
+  "version": "v4.3.0",
   "license": "BSD-3-Clause",
   "archive": {
-    "url": "https://github.com/mcdotstar/mcstas-chopper-lib/archive/refs/tags/v4.2.3.tar.gz",
-    "sha256": "efa9baeb7e8dd2fc36e99bece89958dd2979afa0723fec1301eb91191789090d",
+    "url": "https://github.com/mcdotstar/mcstas-chopper-lib/archive/refs/tags/v4.3.0.tar.gz",
+    "sha256": "70d74198f5f4f6d4aefb34a5f3b3cc75e1ed5b6defb937fc60917d567d698709",
     "strip": 1
   },
   "files": [
diff --git a/mcstas-comps/share/chopper-lib.ext b/mcstas-comps/share/chopper-lib.ext
index 6d616f1c3..ac9f52e92 100644
--- a/mcstas-comps/share/chopper-lib.ext
+++ b/mcstas-comps/share/chopper-lib.ext
@@ -3,17 +3,17 @@
   "description": "Chopper opening/closing times and (inverse velocity, time) masks, shared by the contributed NXdisk_chopper, Masked_ESS_butterfly and Polygon_ESS_butterfly components.",
   "homepage": "https://github.com/mcdotstar/mcstas-chopper-lib",
   "git": "https://github.com/mcdotstar/mcstas-chopper-lib.git",
-  "version": "v4.2.3",
+  "version": "v4.3.0",
   "license": "BSD-3-Clause",
-  "base": "https://raw.githubusercontent.com/mcdotstar/mcstas-chopper-lib/v4.2.3/",
+  "base": "https://raw.githubusercontent.com/mcdotstar/mcstas-chopper-lib/v4.3.0/",
   "files": [
     {
       "name": "chopper-lib.h",
-      "sha256": "cc6b38b506fb1ac0586047788eb1930d6016bd0d95a19114f29d770b6120ab2b"
+      "sha256": "fd07bbbb6d60d4d7305aa06d644889e95c902181e4ac90c8b1ee65844b03120c"
     },
     {
       "name": "chopper-lib.c",
-      "sha256": "ca70dfbc5923e9cd7995967470cb7560c5e1b78bacde1c16fd62348c52b78d47"
+      "sha256": "95dc9e15b6929e13d71d41bb3969895fc8fa1d9f42a8d18cc5b42ad84273466c"
     },
     {
       "name": "LICENSE",