diff --git a/STM32F303xC.ld b/STM32F303xC.ld
index 179d3be..76c838b 100644
--- a/STM32F303xC.ld
+++ b/STM32F303xC.ld
@@ -19,14 +19,14 @@
  */
 MEMORY
 {
-    flash0  : org = 0x08000000, len = 236k
+    flash0  : org = 0x08000000, len = 240k
     flash1  : org = 0x00000000, len = 0
     flash2  : org = 0x00000000, len = 0
     flash3  : org = 0x00000000, len = 0
     flash4  : org = 0x00000000, len = 0
     flash5  : org = 0x00000000, len = 0
     flash6  : org = 0x00000000, len = 0
-    flash7  : org = 0x0803B000, len = 20k
+    flash7  : org = 0x0803C000, len = 16k
     ram0    : org = 0x20000000, len = 40k
     ram1    : org = 0x00000000, len = 0
     ram2    : org = 0x00000000, len = 0
diff --git a/flash.c b/flash.c
index 419530b..bc4117b 100644
--- a/flash.c
+++ b/flash.c
@@ -78,6 +78,7 @@ checksum(const void *start, size_t len)
   return value;
 }
 
+
 int
 config_save(void)
 {
@@ -85,6 +86,7 @@ config_save(void)
   uint16_t *dst = (uint16_t*)SAVE_CONFIG_ADDR;
   int count = sizeof(config_t) / sizeof(uint16_t);
 
+
   config.magic = CONFIG_MAGIC;
   config.checksum = checksum(&config, sizeof config - sizeof config.checksum);
 
@@ -92,6 +94,9 @@ config_save(void)
 
   /* erase flash pages */
   flash_erase_page((uint32_t)dst);
+#if SAVE_CONFIG_SIZE > FLASH_PAGESIZE       // two flash pages
+  flash_erase_page(((uint32_t)dst) + FLASH_PAGESIZE);
+#endif
 
   /* write to flash */
   while (count-- > 0) {
@@ -156,6 +161,7 @@ caldata_save(uint16_t id)
     flash_program_half_word((uint32_t)dst, *src++);
     dst++;
   }
+#if 0
   // Flash stored trace to flash
   count = sizeof(stored_t) /  sizeof(uint16_t);
   src = (uint16_t*)&stored_t[0];
@@ -163,7 +169,7 @@ caldata_save(uint16_t id)
     flash_program_half_word((uint32_t)dst, *src++);
     dst++;
   }
-
+#endif
   /* after saving data, make active configuration points to flash */
 //  active_props = (setting_t*)saveareas[id];
 //  lastsaveid = id;
@@ -220,9 +226,11 @@ caldata_recall(uint16_t id)
 
   /* duplicated saved data onto sram to be able to modify marker/trace */
   memcpy(dst, src, sizeof(setting_t));
+#if 0
   // Restore stored trace
   src = &(src[1]);
   memcpy(stored_t, src, sizeof(stored_t));
+#endif
   update_min_max_freq();
   update_frequencies();
   set_scale(setting.scale);
diff --git a/nanovna.h b/nanovna.h
index 9b2627a..c8ce30a 100644
--- a/nanovna.h
+++ b/nanovna.h
@@ -212,15 +212,21 @@ typedef uint32_t freq_t;
  #define CORRECTION_LOW_ULTRA 2
  #define CORRECTION_LNA_ULTRA 3
  #ifdef  DIRECT_CORRECTION
-   #define CORRECTION_DIRECT   4
-   #define CORRECTION_LNA_DIRECT   5
-   #define CORRECTION_LOW_OUT  6
-   #define CORRECTION_HIGH     7
-   #define CORRECTION_SIZE     8
+   #define CORRECTION_DIRECT         4
+   #define CORRECTION_LNA_DIRECT     5
+   #define CORRECTION_LOW_OUT        6
+   #define CORRECTION_LOW_OUT_DIRECT 7
+   #define CORRECTION_LOW_OUT_ADF    8
+   #define CORRECTION_LOW_OUT_MIXER  9
+   #define CORRECTION_HIGH           10
+   #define CORRECTION_SIZE           11
 #else
-  #define CORRECTION_LOW_OUT  4
-  #define CORRECTION_HIGH     5
-  #define CORRECTION_SIZE     6
+  #define CORRECTION_LOW_OUT        4
+  #define CORRECTION_LOW_OUT_DIRECT 5
+  #define CORRECTION_LOW_OUT_ADF    6
+  #define CORRECTION_LOW_OUT_MIXER  7
+  #define CORRECTION_HIGH           8
+  #define CORRECTION_SIZE           9
 #endif
 #endif
 typedef float measurement_t[TRACES_MAX][POINTS_COUNT];
@@ -1239,23 +1245,33 @@ extern int linear_averaging;
 // config save area (flash7 addr)
 #ifdef TINYSA3
 #define SAVE_CONFIG_ADDR        0x0801D000
+#define SAVE_CONFIG_SIZE        FLASH_PAGESIZE
+#define FLASH_END               0x08020000
 #endif
 
 #ifdef TINYSA4
-#define SAVE_CONFIG_ADDR        0x0803A800
+#define SAVE_CONFIG_ADDR        0x0803C000
+#define SAVE_CONFIG_SIZE        FLASH_PAGESIZE*2
+#define FLASH_END               0x08040000
 #endif
 
-#define SAVE_CONFIG_SIZE        0x00000800
+typedef char assert_config[sizeof(config_t)> SAVE_CONFIG_SIZE ? -1 : 1];        // Check config size
+
 // setting_t save area (save area + config size)
 #define SAVE_PROP_CONFIG_ADDR   (SAVE_CONFIG_ADDR + SAVE_CONFIG_SIZE)
+
 #ifdef TINYSA4
-#define SAVE_PROP_CONFIG_SIZE   0x00001000
+#define SAVE_PROP_CONFIG_SIZE   0x00000800
 #else
 #define SAVE_PROP_CONFIG_SIZE   0x00000800
 #endif
+
+typedef char assert_setting[sizeof(setting_t)> SAVE_PROP_CONFIG_SIZE ? -1 : 1]; // Check setting size
+
 // Should include all save slots
 #define SAVE_CONFIG_AREA_SIZE   (SAVE_CONFIG_SIZE + SAVEAREA_MAX * SAVE_PROP_CONFIG_SIZE)
 
+typedef char assert_flash[ SAVE_CONFIG_ADDR + SAVE_CONFIG_AREA_SIZE >= FLASH_END ? -1 : 1];
 
 #else
 #define SAVEAREA_MAX 4