diff --git a/Build-Instructions-SG1/led-size.jpg b/Build-Instructions-SG1/led-size.jpg
new file mode 100644
index 0000000..bd0187c
Binary files /dev/null and b/Build-Instructions-SG1/led-size.jpg differ
diff --git a/Build-Instructions-SG1/stepper-size.jpg b/Build-Instructions-SG1/stepper-size.jpg
new file mode 100644
index 0000000..e4a0857
Binary files /dev/null and b/Build-Instructions-SG1/stepper-size.jpg differ
diff --git a/Dockerfile b/Dockerfile
index 42218ad..f354e32 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM espressif/idf:release-v5.0
+FROM espressif/idf:release-v5.1
 
 WORKDIR /app
 
diff --git a/Source/base-fw/main/GateStepper.c b/Source/base-fw/main/GateStepper.c
index 1dd4ed4..11945de 100644
--- a/Source/base-fw/main/GateStepper.c
+++ b/Source/base-fw/main/GateStepper.c
@@ -92,7 +92,7 @@ static IRAM_ATTR void tmr_signal_callback(void* arg)
     if (m_bPeriodAlternate)
     {
         const int32_t s32 = MIN(abs(m_s32Count) , abs(m_s32Target - m_s32Count));
-
+        /* Former code
         if (s32 < 50*2)
             m_s32Period = 2000/2;
         else if (s32 < 100*2)
@@ -110,7 +110,25 @@ static IRAM_ATTR void tmr_signal_callback(void* arg)
         else if (s32 < 700*2)
             m_s32Period = 600/2;
         else
-            m_s32Period = 400/2;
+            m_s32Period = 400/2;*/
+        /* I just did some tests until I was satisfied */
+        /* #1 (100, 1000), (1400, 300)
+           a = -0.53846153846153846153846153846154
+           b = 1053.84 */
+        /* #2 (100, 700), (1400, 200)
+           a = -0.3846
+           b = 738.44 */
+        const int32_t a = -461;
+        const int32_t b = 946840;
+        m_s32Period = (a * s32 + b)/1000;
+
+        // I hoped it would reduce jitter.
+        m_s32Period = (m_s32Period / 50) * 50;
+
+        if (m_s32Period < 200)
+            m_s32Period = 200;
+        if (m_s32Period > 700)
+            m_s32Period = 700;
 
         // Count every two
         m_s32Count++;
diff --git a/Source/base-fw/main/webserver/EmbeddedFiles.txt b/Source/base-fw/main/webserver/EmbeddedFiles.txt
deleted file mode 100644
index a868652..0000000
--- a/Source/base-fw/main/webserver/EmbeddedFiles.txt
+++ /dev/null
@@ -1,20 +0,0 @@
-about-ota.html
-config.json
-favicon.ico
-index.html
-settings.html
-css/content.css
-css/sidenav.css
-css/top-menu.css
-font/ancient_virtual.ttf.woff
-font/eurostile_extended2_bold.woff
-font/stargateuniverse.woff
-font/copyrights/ancient_virtual_copyright.txt
-font/copyrights/eurostile_extended2_bold_copyright.html
-font/copyrights/stargateuniverse-lisez-moi.txt
-font/copyrights/stargateuniverse-readme.txt
-img/home.svg
-js/about-ota.js
-js/app.js
-js/settings.js
-js/vue.min.js
\ No newline at end of file