diff --git a/Source/hoc-clk/sysmodule/src/file/kip.cpp b/Source/hoc-clk/sysmodule/src/file/kip.cpp
index 520b39e6..504d07a5 100644
--- a/Source/hoc-clk/sysmodule/src/file/kip.cpp
+++ b/Source/hoc-clk/sysmodule/src/file/kip.cpp
@@ -34,19 +34,17 @@ namespace kip {
         //     }
         // }
         CustomizeTable table;
-        FILE* fp;
-        fp = fopen("sdmc:/atmosphere/kips/hoc.kip", "r");
+        FILE* fp = fopen("sdmc:/atmosphere/kips/hoc.kip", "r+b");
 
         if (fp == NULL) {
             notification::writeNotification("Horizon OC\nKip opening failed");
             kipAvailable = false;
             return;
-        } else {
-            kipAvailable = true;
-            fclose(fp);
         }
+        kipAvailable = true;
 
-        if (!cust_read_and_cache("sdmc:/atmosphere/kips/hoc.kip", &table)) {
+        if (!cust_read_table_f(fp, &table)) {
+            fclose(fp);
             fileUtils::LogLine("[kip] Failed to read KIP file");
             notification::writeNotification("Horizon OC\nKip read failed");
             return;
@@ -55,11 +53,13 @@ namespace kip {
         u32 custRev    = cust_get_cust_rev(&table);
         u32 kipVersion = cust_get_kip_version(&table);
         if (custRev < CUST_REV || kipVersion < KIP_VERSION) {
+            fclose(fp);
             notification::writeNotification("Horizon OC\nOutdated kip detected!\nPlease update Horizon OC");
             fileUtils::LogLine("Cust revision: %u", custRev);
             fileUtils::LogLine("Kip version: %u", kipVersion);
             return;
         } else if (custRev > CUST_REV || kipVersion > KIP_VERSION) {
+            fclose(fp);
             notification::writeNotification("Horizon OC\nOutdated sysmodule detected!\nPlease update Horizon OC");
             fileUtils::LogLine("Cust revision: %u", custRev);
             fileUtils::LogLine("Kip version: %u", kipVersion);
@@ -138,10 +138,13 @@ namespace kip {
         CUST_WRITE_FIELD_BATCH(&table, t6_tRTW_fine_tune, config::GetConfigValue(KipConfigValue_t6_tRTW_fine_tune));
         CUST_WRITE_FIELD_BATCH(&table, t7_tWTR_fine_tune, config::GetConfigValue(KipConfigValue_t7_tWTR_fine_tune));
 
-        if (!cust_write_table("sdmc:/atmosphere/kips/hoc.kip", &table)) {
+        if (!cust_write_table_f(fp, &table)) {
+            fclose(fp);
             fileUtils::LogLine("[kip] Failed to write KIP file");
             notification::writeNotification("Horizon OC\nKip write failed");
+            return;
         }
+        fclose(fp);
 
         HocClkConfigValueList configValues;
         config::GetConfigValues(&configValues);
@@ -163,27 +166,26 @@ namespace kip {
 
     void GetKipData()
     {
-        FILE* fp;
-        fp = fopen("sdmc:/atmosphere/kips/hoc.kip", "r");
+        FILE* fp = fopen("sdmc:/atmosphere/kips/hoc.kip", "rb");
 
         if (fp == NULL) {
             notification::writeNotification("Horizon OC\nKip opening failed");
             kipAvailable = false;
             return;
-        } else {
-            kipAvailable = true;
-            fclose(fp);
         }
+        kipAvailable = true;
 
         HocClkConfigValueList configValues;
         config::GetConfigValues(&configValues);
 
         CustomizeTable table;
-        if (!cust_read_and_cache("sdmc:/atmosphere/kips/hoc.kip", &table)) {
+        if (!cust_read_table_f(fp, &table)) {
+            fclose(fp);
             fileUtils::LogLine("[kip] Failed to read KIP file for GetKipData");
             notification::writeNotification("Horizon OC\nKip read failed");
             return;
         }
+        fclose(fp);
 
         // if(cust_get_cust_rev(&table) != CUST_REV) {
         //     notification::writeNotification("Horizon OC\nKip version mismatch\nPlease reinstall Horizon OC");
diff --git a/Source/hoc-clk/sysmodule/src/file/kip.hpp b/Source/hoc-clk/sysmodule/src/file/kip.hpp
index 7e7b2430..a30b0fa7 100644
--- a/Source/hoc-clk/sysmodule/src/file/kip.hpp
+++ b/Source/hoc-clk/sysmodule/src/file/kip.hpp
@@ -128,54 +128,59 @@ namespace kip {
         return false;
     }
 
+    static long cachedCustOffset = -1;
+
+    static inline long cust_get_offset(FILE* f) {
+        if (cachedCustOffset >= 0) return cachedCustOffset;
+        long off;
+        if (!cust_find_offset(f, &off)) return -1;
+        cachedCustOffset = off;
+        return off;
+    }
+
+    static inline bool cust_read_table_f(FILE* f, CustomizeTable* out) {
+        long off = cust_get_offset(f);
+        if (off < 0) return false;
+
+        fseek(f, 0, SEEK_END);
+        if (off + (long)sizeof(CustomizeTable) > ftell(f)) return false;
+
+        fseek(f, off, SEEK_SET);
+        if (fread(out, 1, sizeof(CustomizeTable), f) != sizeof(CustomizeTable)) return false;
+
+        if (memcmp(out->cust, CUST_MAGIC, CUST_MAGIC_LEN) != 0) {
+            cachedCustOffset = -1;
+            return false;
+        }
+        return true;
+    }
+
+    static inline bool cust_write_table_f(FILE* f, const CustomizeTable* in) {
+        long off = cust_get_offset(f);
+        if (off < 0) return false;
+
+        fseek(f, 0, SEEK_END);
+        if (off + (long)sizeof(CustomizeTable) > ftell(f)) return false;
+
+        fseek(f, off, SEEK_SET);
+        bool ok = fwrite(in, 1, sizeof(CustomizeTable), f) == sizeof(CustomizeTable);
+        fflush(f);
+        return ok;
+    }
+
     static inline bool cust_read_table(const char* path, CustomizeTable* out) {
         FILE* f = fopen(path, "rb");
         if (!f) return false;
-
-        long off;
-        if (!cust_find_offset(f, &off)) {
-            fclose(f);
-            return false;
-        }
-
-        fseek(f, 0, SEEK_END);
-        long size = ftell(f);
-
-        if (off + (long)sizeof(CustomizeTable) > size) {
-            fclose(f);
-            return false;
-        }
-
-        fseek(f, off, SEEK_SET);
-        bool ok = fread(out, 1, sizeof(CustomizeTable), f) == sizeof(CustomizeTable);
+        bool ok = cust_read_table_f(f, out);
         fclose(f);
-
-        return ok && memcmp(out->cust, CUST_MAGIC, CUST_MAGIC_LEN) == 0;
+        return ok;
     }
 
     static inline bool cust_write_table(const char* path, const CustomizeTable* in) {
         FILE* f = fopen(path, "r+b");
         if (!f) return false;
-
-        long off;
-        if (!cust_find_offset(f, &off)) {
-            fclose(f);
-            return false;
-        }
-
-        fseek(f, 0, SEEK_END);
-        long size = ftell(f);
-
-        if (off + (long)sizeof(CustomizeTable) > size) {
-            fclose(f);
-            return false;
-        }
-
-        fseek(f, off, SEEK_SET);
-        bool ok = fwrite(in, 1, sizeof(CustomizeTable), f) == sizeof(CustomizeTable);
-        fflush(f);
+        bool ok = cust_write_table_f(f, in);
         fclose(f);
-
         return ok;
     }
 
diff --git a/dist/atmosphere/contents/00FF0000636C6BFF/exefs.nsp b/dist/atmosphere/contents/00FF0000636C6BFF/exefs.nsp
index 66f9ff38..a46e5c76 100644
Binary files a/dist/atmosphere/contents/00FF0000636C6BFF/exefs.nsp and b/dist/atmosphere/contents/00FF0000636C6BFF/exefs.nsp differ
diff --git a/dist/atmosphere/kips/hoc.kip b/dist/atmosphere/kips/hoc.kip
index 1a810018..6b9ec0d6 100644
Binary files a/dist/atmosphere/kips/hoc.kip and b/dist/atmosphere/kips/hoc.kip differ
diff --git a/dist/switch/.overlays/horizon-oc-overlay.ovl b/dist/switch/.overlays/horizon-oc-overlay.ovl
index 9e815aba..9ce0375f 100644
Binary files a/dist/switch/.overlays/horizon-oc-overlay.ovl and b/dist/switch/.overlays/horizon-oc-overlay.ovl differ