diff --git a/platformio.ini b/platformio.ini
index 97082693eb..e334b7e357 100644
--- a/platformio.ini
+++ b/platformio.ini
@@ -10,7 +10,7 @@
 # ------------------------------------------------------------------------------
 
 # CI/release binaries
-default_envs = nodemcuv2, esp8266_2m, esp01_1m_full, nodemcuv2_160, esp8266_2m_160, esp01_1m_full_160, esp32dev, esp32_eth, esp32dev_audioreactive, lolin_s2_mini, esp32c3dev, esp32s3dev_8MB, esp32s3dev_8MB_PSRAM_opi, esp32_wrover
+default_envs = nodemcuv2, esp8266_2m, esp01_1m_full, nodemcuv2_160, esp8266_2m_160, esp01_1m_full_160, esp32dev, esp32_eth, esp32dev_audioreactive, lolin_s2_mini, esp32c3dev, esp32s3dev_8MB, esp32s3dev_8MB_PSRAM_opi, esp32s3_4M_PSRAM_qspi, esp32_wrover
 
 src_dir  = ./wled00
 data_dir = ./wled00/data
@@ -425,8 +425,9 @@ build_flags = ${common.build_flags} ${esp32s3.build_flags} -D WLED_RELEASE_NAME=
   -D CONFIG_LITTLEFS_FOR_IDF_3_2 -D WLED_WATCHDOG_TIMEOUT=0
   -D ARDUINO_USB_CDC_ON_BOOT=0  ;; -D ARDUINO_USB_MODE=1 ;; for boards with serial-to-USB chip
   ;-D ARDUINO_USB_CDC_ON_BOOT=1 ;; -D ARDUINO_USB_MODE=1 ;; for boards with USB-OTG connector only (USBCDC or "TinyUSB")
-  ;-D WLED_DEBUG
+  ${esp32.AR_build_flags}
 lib_deps = ${esp32s3.lib_deps}
+  ${esp32.AR_lib_deps}
 board_build.partitions = tools/WLED_ESP32_8MB.csv
 board_build.f_flash = 80000000L
 board_build.flash_mode = qio
@@ -445,13 +446,35 @@ build_flags = ${common.build_flags} ${esp32s3.build_flags} -D WLED_RELEASE_NAME=
   -D CONFIG_LITTLEFS_FOR_IDF_3_2 -D WLED_WATCHDOG_TIMEOUT=0
   ;-D ARDUINO_USB_CDC_ON_BOOT=0  ;; -D ARDUINO_USB_MODE=1 ;; for boards with serial-to-USB chip
   -D ARDUINO_USB_CDC_ON_BOOT=1 -D ARDUINO_USB_MODE=1      ;; for boards with USB-OTG connector only (USBCDC or "TinyUSB")
-  ; -D WLED_RELEASE_NAME=ESP32-S3_PSRAM
+  -DBOARD_HAS_PSRAM
+  ${esp32.AR_build_flags}
 lib_deps = ${esp32s3.lib_deps}
+  ${esp32.AR_lib_deps}
 board_build.partitions = tools/WLED_ESP32_8MB.csv
 board_build.f_flash = 80000000L
 board_build.flash_mode = qio
 monitor_filters = esp32_exception_decoder
 
+[env:esp32s3_4M_PSRAM_qspi]
+;; ESP32-S3, with 4MB FLASH and <= 4MB PSRAM (memory_type: qio_qspi)
+board = esp32-s3-devkitc-1 ;; generic dev board; the next line adds PSRAM support
+board_build.arduino.memory_type = qio_qspi ;; use with PSRAM: 2MB or 4MB
+platform = ${esp32s3.platform}
+platform_packages = ${esp32s3.platform_packages}
+upload_speed = 921600
+build_unflags = ${common.build_unflags}
+build_flags = ${common.build_flags} ${esp32s3.build_flags} -D WLED_RELEASE_NAME=ESP32-S3_4M_PSRAM_qspi
+  -DARDUINO_USB_CDC_ON_BOOT=1 -DARDUINO_USB_MODE=1      ;; for boards with USB-OTG connector only (USBCDC or "TinyUSB")
+  -DBOARD_HAS_PSRAM
+  -D WLED_WATCHDOG_TIMEOUT=0
+  ${esp32.AR_build_flags}
+lib_deps = ${esp32s3.lib_deps}
+  ${esp32.AR_lib_deps}
+board_build.partitions = tools/WLED_ESP32_4MB_1MB_FS.csv
+board_build.f_flash = 80000000L
+board_build.flash_mode = qio
+monitor_filters = esp32_exception_decoder
+
 [env:lolin_s2_mini]
 platform = ${esp32s2.platform}
 platform_packages = ${esp32s2.platform_packages}
@@ -464,6 +487,7 @@ build_flags = ${common.build_flags} ${esp32s2.build_flags} -D WLED_RELEASE_NAME=
   -DARDUINO_USB_CDC_ON_BOOT=1
   -DARDUINO_USB_MSC_ON_BOOT=0
   -DARDUINO_USB_DFU_ON_BOOT=0
+  -DBOARD_HAS_PSRAM
   -DLOLIN_WIFI_FIX ; seems to work much better with this
   -D WLED_WATCHDOG_TIMEOUT=0
   -D CONFIG_ASYNC_TCP_USE_WDT=0
@@ -474,4 +498,6 @@ build_flags = ${common.build_flags} ${esp32s2.build_flags} -D WLED_RELEASE_NAME=
   -D HW_PIN_DATASPI=11
   -D HW_PIN_MISOSPI=9
 ;  -D STATUSLED=15
+  ${esp32.AR_build_flags}
 lib_deps = ${esp32s2.lib_deps}
+  ${esp32.AR_lib_deps}
diff --git a/wled00/FX_2Dfcn.cpp b/wled00/FX_2Dfcn.cpp
index a37e5d11ff..65054da701 100644
--- a/wled00/FX_2Dfcn.cpp
+++ b/wled00/FX_2Dfcn.cpp
@@ -65,9 +65,10 @@ void WS2812FX::setUpMatrix() {
 
     customMappingSize = 0; // prevent use of mapping if anything goes wrong
 
-    if (customMappingTable == nullptr) customMappingTable = new uint16_t[getLengthTotal()];
+    if (customMappingTable) delete[] customMappingTable;
+    customMappingTable = new uint16_t[getLengthTotal()];
 
-    if (customMappingTable != nullptr) {
+    if (customMappingTable) {
       customMappingSize = getLengthTotal();
 
       // fill with empty in case we don't fill the entire matrix
@@ -138,7 +139,7 @@ void WS2812FX::setUpMatrix() {
       DEBUG_PRINTLN();
       #endif
     } else { // memory allocation error
-      DEBUG_PRINTLN(F("Ledmap alloc error."));
+      DEBUG_PRINTLN(F("ERROR 2D LED map allocation error."));
       isMatrix = false;
       panels = 0;
       panel.clear();
diff --git a/wled00/FX_fcn.cpp b/wled00/FX_fcn.cpp
index 4ef110e070..4a3cccdfe6 100644
--- a/wled00/FX_fcn.cpp
+++ b/wled00/FX_fcn.cpp
@@ -1753,19 +1753,23 @@ bool WS2812FX::deserializeMap(uint8_t n) {
     return false; // if file does not load properly then exit
   }
 
-  DEBUG_PRINT(F("Reading LED map from ")); DEBUG_PRINTLN(fileName);
-
-  if (customMappingTable == nullptr) customMappingTable = new uint16_t[getLengthTotal()];
-
-  JsonObject root = pDoc->as<JsonObject>();
-  JsonArray map = root[F("map")];
-  if (!map.isNull() && map.size()) {  // not an empty map
-    customMappingSize = min((unsigned)map.size(), (unsigned)getLengthTotal());
-    for (unsigned i=0; i<customMappingSize; i++) customMappingTable[i] = (uint16_t) (map[i]<0 ? 0xFFFFU : map[i]);
+  if (customMappingTable) delete[] customMappingTable;
+  customMappingTable = new uint16_t[getLengthTotal()];
+
+  if (customMappingTable) {
+    DEBUG_PRINT(F("Reading LED map from ")); DEBUG_PRINTLN(fileName);
+    JsonObject root = pDoc->as<JsonObject>();
+    JsonArray map = root[F("map")];
+    if (!map.isNull() && map.size()) {  // not an empty map
+      customMappingSize = min((unsigned)map.size(), (unsigned)getLengthTotal());
+      for (unsigned i=0; i<customMappingSize; i++) customMappingTable[i] = (uint16_t) (map[i]<0 ? 0xFFFFU : map[i]);
+    }
+  } else {
+    DEBUG_PRINTLN(F("ERROR LED map allocation error."));
   }
 
   releaseJSONBufferLock();
-  return true;
+  return (customMappingSize > 0);
 }
 
 uint16_t IRAM_ATTR WS2812FX::getMappedPixelIndex(uint16_t index) {