[Xoom Android Development] HuckFinn:
OK I would not consider myself a newbie, but I definitely do not understand all the intricate details/steps you guys do. I have read this thread from start to finish and I would really appreciate a full step-by-step in one location guide. Since one does not exist I hope you do not mind if I try to outline the steps I think I need to do before I take the plunge. In the end maybe this will be useful for others.

Updated after successful flashing with the help of webeougher. BigPart details are taken from here. If you are on a Stingray you probably have already seen this thread, but Wingray users may have missed this.

First, my starting point. I am coming from CM10.1 and currently using ClockworkMod Recovery v6.0.3.1. I do not mind starting completely over, but it would be nice to be able to restore some APPs and Data.

Preliminary work:

1) First I ran a full Helium Backup to my SD Card as well as a TB backup of the few apps Helium would not backup.

2)Booted into CWM and did a full Nandroid backup

3)Connected my Xoom to my PC and backed up any critical files.

4)Booted into CWM and flashed TWRP (non-BigPart) and did another Nandroid - Yes I know this is probably redundant, but I thought it would be good to have a TWRP back up in case I want to revert.

5)Rebooted

Upgrade:

1) Downloaded the following files and placed them on the SD card and verified all checksums match.

-cm-11-20140207-UNOFFICIAL-1931+0100-wingray.zip

-pa_gapps-stock-4.4.2-20140207-signed.zip

-R.A.H._TWRPv2.6.3_BigPart_selinux.zip

2.) Reboot your tablet into recovery and flash the TWRP 2.6.3.0 BigPart touch recovery. DO NOT REBOOT YET!

3.) Tap the Home icon, tap the Wipe tab, tap the Advanced Wipe tab, and wipe everything but sdcard (that means Dalvik Cache, System, Cache, Data, and Internal Storage)

4.) Tap the Home icon, tap the Reboot tab, tap the Recovery tab. You will get a “No OS” warning, tap “Reboot Anyway”. You will be prompted to install SuperSU – ignore this and reboot into recovery.

5.) Once you’re back into recovery (CAUTION: THIS MAY TAKE SOME TIME. BE PATIENT AND LET YOUR TABLET DO ITS THING!) You may get a warning about data being encrypted, but just tap the Home icon, then tap the Wipe tab. Tap the Format Data tab, type “yes” when prompted, and wait for your data to format. Go back to the main wipe menu, tap the Advanced Wipe tab, and select System and Cache and proceed to wipe them.

6.) Tap the Home icon, tap the Reboot tab, tap the Recovery tab. Again, you will get the “No OS” warning and the prompt to install SuperSU – ignore both of them and allow your tablet to reboot into recovery, which, again, may take some time.

7.) Tap the Mount tab. Sdcard, Cache, and Data should be checked; System should be unchecked. Tap the box next to System, make sure that it mounts without any errors, and then uncheck it again. If you’ve made it this far, you’ve successfully repartitioned your tablet back to BigPart.

8.) Tap the Install tab and flash the CM ROM and your Gapps of choice.

9)Reboot, setup CM and Google Account, Download Helium/Titanium Backup and restore User Apps & Data

A HUGE "Thank You" to all the developers who made this possible. I was considering getting rid of my Xoom and purchasing a new tablet, but nothing has the build quality/toughness of the original Xoom. You have breathed new life into these aging tablets.