Unhappy [HELP] Sony Tablet S bricked

Hi guys, @stifilz,

I managed to brick my STS by flashing by mistake (and total blindness apparently) XTS JB firmware on it...
I tried flashing stock ICS US firmware (the full version) back on it through recovery mode, as it's the only thing that's currently working, but to no avail.

I get the error below (recovery.log):

Code:
Starting recovery on Fri Dec 20 01:36:49 2013
can't open /dev/tty0: No such file or directory
framebuffer: fd 3 (1280 x 800)
recovery filesystem table
=========================
  0 /tmp ramdisk (null) (null) 0
  1 /configs ext2 /dev/block/mmcblk0p1 (null) 0
  2 /system0 ext4 /dev/block/mmcblk0p2 (null) 0
  3 /system1 ext4 /dev/block/mmcblk0p3 (null) 0
  4 /cache ext4 /dev/block/mmcblk0p4 (null) 0
  5 /misc emmc /dev/block/mmcblk0p5 (null) 0
  6 /staging ext4 /dev/block/mmcblk0p6 (null) 0
  7 /blflags ext4 /dev/block/mmcblk0p7 (null) 0
  8 /datapp ext4 /dev/block/mmcblk0p8 (null) 0
  9 /log ext4 /dev/block/mmcblk0p9 (null) 0
  10 /data ext4 /dev/block/mmcblk0p10 (null) 0
  11 /vsdcard vfat /dev/block/mmcblk0p11 (null) 0
  12 /sdcard vfat /dev/block/mmcblk1p1 /dev/block/mmcblk1 0
  13 /boot emmc boot (null) 0
  14 /recovery emmc recovery (null) 0
  15 /system ext4 system (null) 0
  16 /vendor0 ext4 /datapp/vendor/vendor0.img (null) 0
  17 /vendor1 ext4 /datapp/vendor/vendor1.img (null) 0

Command: "/sbin/recovery"

ro.secure=1
ro.allow.mock.location=0
ro.debuggable=0
persist.sys.usb.config=mtp
ro.build.id=TISU0124
ro.build.display.id=TISU0124
ro.build.version.incremental=120914043
ro.build.version.sdk=15
ro.build.version.codename=REL
ro.build.version.release=4.0.3
ro.build.date=Fri Sep 14 04:41:30 JST 2012
ro.build.date.utc=1347565290
ro.build.type=user
ro.build.user=integ-build
ro.build.host=build5
ro.build.tags=test-keys
ro.product.model=Sony Tablet S
ro.product.brand=Sony
ro.product.name=SYS_001
ro.product.device=nbx03
ro.product.board=nbx03
ro.product.cpu.abi=armeabi-v7a
ro.product.cpu.abi2=armeabi
ro.product.manufacturer=Sony
ro.product.locale.language=en
ro.product.locale.region=US
ro.wifi.channels=
ro.board.platform=tegra
ro.build.product=nbx03
ro.build.description=SYS_001-user 4.0.3 TISU0124 120914043 test-keys
ro.build.fingerprint=Sony/SYS_001/nbx03:4.0.3/TISU0124/120914043:user/test-keys
ro.build.characteristics=tablet
ro.opengles.version=131072
wifi.interface=wlan0
ro.ethernet.interface=eth0
ro.ethernet.autoEnable=yes
rild.libargs=-d /dev/ttyACM1 -i rmnet0
windowsmgr.max_events_per_sec=120
ro.tether.denied=true
ro.sony.sound.enabled=true
ro.sony.display.release=release5
ro.product-res-path=vendor/framework/SemcGenericUxpRes.apk
ro.sony.autovolume.threshold=10
ro.sony.update.server=info.update.sony.net
ro.sony.update.category_id=ST001
ro.config.notification_sound=OnTheHunt.ogg
ro.config.alarm_alert=Alarm_Classic.ogg
drm.service.enabled=true
dalvik.vm.heapstartsize=5m
dalvik.vm.heapgrowthlimit=48m
dalvik.vm.heapsize=256m
ro.sony.wifisleep=0
ro.semc.xloud.supported=true
ro.somc.clearphase.supported=true
ro.setupwizard.mode=DISABLED
ro.com.google.gmsversion=4.0_r3
ro.com.google.clientidbase=android-sony
dalvik.vm.dexopt-flags=m=y
net.bt.name=Android
net.change=net.bt.name
dalvik.vm.stack-trace-file=/data/anr/traces.txt
ro.sony.wan.ipv6.enable=false
ro.sony.dlna_dms.enabled=false
ro.somc.social_product_model=PRODUCT_MODEL_TABLET
ro.sony.irremote.protocol_type=1
ro.sony.ols.eula=0
ro.factorytest=0
ro.bootmode=unknown
ro.baseband=unknown
ro.carrier=unknown
ro.bootloader=0x00000008
ro.hardware=nbx03
ro.revision=0
init.svc.recovery=running
init.svc.nfx_daemon=running
init.svc.radbd=running

W:failed to mount /dev/block/mmcblk1p1 (No such file or directory); trying /dev/block/mmcblk1
W:failed to mount /dev/block/mmcblk1p1 (No such file or directory); trying /dev/block/mmcblk1


-- Install /sdcard ...
Finding update package...
I:Update location: /sdcard/signed-nbx03_001-ota-121116036.zip
Desklunvr update package...
Opening update package...
I:1 key(s) loaded from /res/keys
Verifying update package...
I:comment is 1465 bytes; signature 1447 bytes from end
I:whole-file signature verified against key 0
I:verify_file returned 0
prev version[121116036] is larger than post version[121116036]
E:Prohibit update as a result of checking version or base sku
Installation aborted..
Is there anything I can do or is this the end for my tablet?
Thank you very much for your help!