The included recovery is CWM 6. I have used it to flash back and forth between the different builds of JB from DK2, CM9 Alpha 6, and multiple ROMs from my Team VeNuM Devs. All have wiped and flashed successfully with no issues.
Its always recommended to go back to EL26, but so far in my experience it hasn't been necessary.
If you are uncomfortable trying it with CWM 6, pm me and I can send you a flashable zip for el26. Once you flash it, just reboot recovery from the advanced menu and then you can flash whatever without worry! :thumbup:
Sent from my SPH-D710 using Android Central Forums