diff --git a/platformio.ini b/platformio.ini
index 006a4986..979c86d5 100644
--- a/platformio.ini
+++ b/platformio.ini
@@ -327,11 +327,14 @@ platform_packages_compat =
                     platformio/tool-esptoolpy #@ ~1.30000.0
 
 
-;; old V3 platform for esp32. Not used any more, just kept for reference
+;; old V3 platform for esp32. Can be a fallback option when hitting flash size limits
 [esp32_legacy]
 platform = espressif32@3.5.0
 platform_packages = framework-arduinoespressif32 @ https://github.com/Aircoookie/arduino-esp32.git#1.0.6.4
+build_unflags = ${common.build_unflags}
+  -Wshadow=compatible-local ;; not supported by older compilers
 build_flags = -g
+  -Wno-unused-variable -Wno-unused-function ;; removes noise
   -DARDUINO_ARCH_ESP32
   -D CONFIG_ASYNC_TCP_USE_WDT=0
   -D CONFIG_ASYNC_TCP_TASK_STACK_SIZE=9472                ;; WLEDMM increase stack by 1.25Kb, as audioreactive needs bigger SETTINGS_STACK_BUF_SIZE
@@ -629,7 +632,7 @@ extends = env:esp32dev_V4_dio80
 board = esp32dev
 platform = ${esp32_legacy.platform}
 platform_packages = ${esp32_legacy.platform_packages}
-build_unflags = ${common.build_unflags}
+build_unflags = ${esp32_legacy.build_unflags}
 build_flags =   ${common.build_flags} ${esp32_legacy.build_flags} -D WLED_RELEASE_NAME=ESP32_compat #-D WLED_DISABLE_BROWNOUT_DET
     ${esp32.AR_build_flags}
 lib_deps = ${esp32_legacy.lib_deps}
@@ -644,7 +647,7 @@ monitor_filters = esp32_exception_decoder
 board = esp32dev
 platform = ${esp32_legacy.platform}
 platform_packages = ${esp32_legacy.platform_packages}
-build_unflags = ${common.build_unflags}
+build_unflags = ${esp32_legacy.build_unflags}
 build_flags =   ${common.build_flags} ${esp32_legacy.build_flags} -D WLED_RELEASE_NAME=ESP32_qio80_compat #-D WLED_DISABLE_BROWNOUT_DET
     ${esp32.AR_build_flags}
 lib_deps = ${esp32_legacy.lib_deps}
@@ -679,7 +682,7 @@ board = esp32-poe
 platform = ${esp32_legacy.platform}
 platform_packages = ${esp32_legacy.platform_packages}
 upload_speed = 921600
-build_unflags = ${common.build_unflags}
+build_unflags = ${esp32_legacy.build_unflags}
 build_flags =   ${common.build_flags} ${esp32_legacy.build_flags} -D WLED_RELEASE_NAME=ESP32_Ethernet_compat -D RLYPIN=-1 -D WLED_USE_ETHERNET -D BTNPIN=-1
   -D WLED_DISABLE_ESPNOW ;; ESP-NOW requires wifi, may crash with ethernet only
   ${esp32.AR_build_flags}
@@ -1216,12 +1219,20 @@ lib_deps_XL =
 ; common defaults for all MM environments
 [esp32_4MB_S_base]
 board = esp32dev
-platform = ${esp32.platform}
-platform_packages = ${esp32.platform_packages}
+;; legacy V3 platform
+platform = ${esp32_legacy.platform}
+platform_packages = ${esp32_legacy.platform_packages}
+build_unflags = ${esp32_legacy.build_unflags}
+build_flags = ${common.build_flags} ${esp32_legacy.build_flags} ${common_mm.build_flags_S} ${common_mm.build_disable_sync_interfaces}
+lib_deps = ${esp32_legacy.lib_deps} ${common_mm.lib_deps_S}
+lib_ignore = ${common_mm.DMXin_lib_ignore} ;; requires V4 framework
 upload_speed = 460800 ; or 921600
-build_unflags = ${common.build_unflags}
-build_flags = ${common.build_flags_esp32} ${common_mm.build_flags_S} ${common_mm.build_disable_sync_interfaces}
-lib_deps = ${esp32.lib_deps} ${common_mm.lib_deps_S}
+;; new V4 platform
+;;platform = ${esp32.platform}
+;;platform_packages = ${esp32.platform_packages}
+;;build_unflags = ${common.build_unflags}
+;;build_flags = ${common.build_flags_esp32} ${common_mm.build_flags_S} ${common_mm.build_disable_sync_interfaces}
+;;lib_deps = ${esp32.lib_deps} ${common_mm.lib_deps_S}
 board_build.partitions = ${esp32.default_partitions}
 board_build.f_flash = 80000000L ; use full 80MHz speed for flash (default = 40Mhz) 
 board_build.flash_mode = dio ; (dio = dual i/o; more compatible than qio = quad i/o)
@@ -1230,7 +1241,7 @@ monitor_filters = esp32_exception_decoder
 ;common default for all max environments
 [esp32_4MB_M_base]
 extends = esp32_4MB_S_base
-build_flags = ${common.build_flags_esp32} ${common_mm.build_flags_S} ${common_mm.build_flags_M} ;; we don't want common_mm.build_disable_sync_interfaces, so we cannot inherit from esp32_4MB_S_base
+build_flags =  ${common.build_flags} ${esp32_legacy.build_flags} ${common_mm.build_flags_S} ${common_mm.build_flags_M} ;; we don't want common_mm.build_disable_sync_interfaces, so we cannot inherit from esp32_4MB_S_base
 build_unflags = ${esp32_4MB_S_base.build_unflags}
 lib_deps = ${esp32_4MB_S_base.lib_deps} ${common_mm.lib_deps_M}
 
@@ -1807,16 +1818,21 @@ board_build.flash_mode = qio ; (dio = dual i/o; more compatible than qio = quad
 ; compiled with ESP-IDF 4.4.1
 [env:esp32_4MB_V4_M]
 extends = esp32_4MB_V4_M_base
+;; needs tasmota framework; will exceed flash limits with default framework
+platform = ${esp32.platform} ;; "V4" tasmota
+platform_packages = ${esp32.platform_packages}
 build_flags = ${esp32_4MB_V4_M_base.esp32_build_flags}
   -D WLED_RELEASE_NAME=esp32_4MB_V4_M
   -D WLED_WATCHDOG_TIMEOUT=0 #-D WLED_DISABLE_BROWNOUT_DET
   -D ARDUINO_USB_CDC_ON_BOOT=0 ; needed for arduino-esp32 >=2.0.4; avoids errors on startup
-  -D WLED_DISABLE_LOXONE ; FLASH 1272 bytes
-  -D WLED_DISABLE_ALEXA ;  RAM 116 bytes; FLASH 13524 bytes
-  -D WLED_DISABLE_HUESYNC ;RAM 122 bytes; FLASH  6308 bytes
-  -D WLED_DISABLE_MQTT ;   RAM 216 bytes; FLASH 16496 bytes   ;; softhack007 disabled to stay below 100% flash size
+  ;;-D WLED_DISABLE_LOXONE ; FLASH 1272 bytes
+  ;;-D WLED_DISABLE_ALEXA ;  RAM 116 bytes; FLASH 13524 bytes
+  ;;-D WLED_DISABLE_HUESYNC ;RAM 122 bytes; FLASH  6308 bytes
+  ;;-D WLED_DISABLE_MQTT ;   RAM 216 bytes; FLASH 16496 bytes   ;; softhack007 disabled to stay below 100% flash size
   -D WLED_DISABLE_INFRARED ;RAM 136 bytes; FLASH 24492 bytes  ;; softhack007 disabled to stay below 100% flash size
-  -D WLEDMM_SAVE_FLASH
+  ;;-D WLEDMM_SAVE_FLASH
+  ;;-D WLED_DISABLE_PARTICLESYSTEM1D ;; exceeds flash size limit
+  ;;-D WLED_DISABLE_PARTICLESYSTEM2D ;; exceeds flash size limit
 lib_deps = ${esp32_4MB_V4_M_base.esp32_lib_deps}
 lib_ignore = IRremoteESP8266 ; use with WLED_DISABLE_INFRARED for faster compilation
   ${common_mm.HUB75_lib_ignore}  ;; over the flash size limit
@@ -1824,10 +1840,10 @@ lib_ignore = IRremoteESP8266 ; use with WLED_DISABLE_INFRARED for faster compila
 build_unflags = ${esp32_4MB_V4_M_base.build_unflags}
   -D USERMOD_ANIMARTRIX ;; Tips our memory usage over the limit
   -D USERMOD_ARTIFX
-  -D USERMOD_AUTO_SAVE
+  ;; -D USERMOD_AUTO_SAVE
   -D WLED_ENABLE_HUB75MATRIX
-; RAM:   [===       ]  26.1% (used 85632 bytes from 327680 bytes)
-; Flash: [==========]  99.5% (used 1565065 bytes from 1572864 bytes)
+; RAM:   [==        ]  23.9% (used 78204 bytes from 327680 bytes)
+; Flash: [========= ]  85.8% (used 1349585 bytes from 1572864 bytes)
 
 ;; V4 build for 16MB flash, optimized for speed; HUB75 supported
 [env:esp32_16MB_V4_S]
@@ -2821,10 +2837,11 @@ board_build.partitions = tools/WLED_ESP32_16MB.csv         ;; WLED standard for
 ;https://www.athom.tech/blank-1/wled-esp32-music-addressable-led-strip-controller
 [env:athom_music_esp32_4MB_M]
 extends = esp32_4MB_M_base
-build_unflags = ${common.build_unflags}
+build_unflags = ${esp32_legacy.build_unflags}
   -D USERMOD_ARTIFX ;; disabled to save some program space in flash
   -D USERMOD_DALLASTEMPERATURE ;; disabled - flash space is too tight for this
   -D USERMOD_ROTARY_ENCODER_UI ;; see above
+  ${common_mm.DMXin_build_flags}
 build_flags = ${esp32_4MB_M_base.build_flags} 
   ${Athom_PDMmic.build_flags}
   -D WLED_AP_SSID_UNIQUE
@@ -2844,6 +2861,8 @@ build_flags = ${esp32_4MB_M_base.build_flags}
   ; -D PWM_PIN=-1
   ; -D WLED_USE_MY_CONFIG
   -D WLEDMM_SAVE_FLASH
+lib_ignore = ${esp32_4MB_M_base.lib_ignore}
+  ${common_mm.DMXin_lib_ignore}
 ; RAM:   [===       ]  26.3% (used 86204 bytes from 327680 bytes)
 ; Flash: [========= ]  93.6% (used 1471681 bytes from 1572864 bytes)
 
@@ -2894,15 +2913,18 @@ build_flags = ${esp32_4MB_M_base.build_flags}
   ; -D MCLK_PIN=0
   -D SR_ENABLE_DEFAULT  ;; enable at first start - no need to manually set "enable", then reboot
   ; -D WLED_USE_MY_CONFIG
-  ; -D WLED_DISABLE_LOXONE
+  -D WLED_DISABLE_LOXONE ;; exceeds flash size limits
   ; -D WLED_DISABLE_ALEXA
   ; -D WLED_DISABLE_HUESYNC
   ; -D WLED_DISABLE_MQTT
   ; -D WLED_DISABLE_INFRARED
   ; -D WLED_ENABLE_DMX
-; RAM:   [===       ]  26.0% (used 85236 bytes from 327680 bytes)
-; Flash: [==========]  97.1% (used 1527049 bytes from 1572864 bytes)
-
+  -D WLEDMM_SAVE_FLASH
+  -D WLED_DISABLE_ESPNOW  ;; might help in case of WiFi connectivity problems
+  -D WLED_DISABLE_PARTICLESYSTEM1D ;; exceeds flash size limit
+  ;; -D WLED_DISABLE_PARTICLESYSTEM2D
+; RAM:   [==        ]  24.2% (used 79424 bytes from 327680 bytes)
+; Flash: [==========]  99.9% (used 1571177 bytes from 1572864 bytes)
 ;; experimental
 ;; PICO environment with ESP-IDF v4.4.4 / arduino-esp32 v2.0.9
 [env:esp32_pico_4MB_V4_S]