Paul, I've been running ACE 1.7 w/EXT4, EB13 support for some time now. I'm itchin' to try Bonsai 4.1.1 now it's been updated. To go to Bonsai from ACE, just install from SD card from the CWM that was installed from ACE 1.7, wipe everything 3X's & that's it, pretty much?