diff --git a/main.c b/main.c
index d585c6b..c9c6118 100644
--- a/main.c
+++ b/main.c
@@ -960,7 +960,7 @@ config_t config = {
   .dac_value =         1922,
 //  .touch_cal =         { 693, 605, 124, 171 },  // 2.4 inch LCD panel
 #ifdef TINYSA3
-  .touch_cal =         { 347, 495, 160, 205 },  // 2.8 inch LCD panel
+  .touch_cal =          { 534, 741, 3458, 3434 }, // 2.8 inch LCD panel
 #endif
 #ifdef TINYSA4
   .touch_cal =          { 444, 715, 3552, 3499 }, // 4 inch panel
diff --git a/nanovna.h b/nanovna.h
index d50b145..c603e78 100644
--- a/nanovna.h
+++ b/nanovna.h
@@ -1384,7 +1384,7 @@ typedef struct properties {
 
 //sizeof(properties_t) == 0x1200
 
-#define CONFIG_MAGIC 0x434f4e5D /* 'CONF' */
+#define CONFIG_MAGIC 0x434f4e5F /* 'CONF' */
 
 extern int16_t lastsaveid;
 //extern properties_t *active_props;