hm, I think you're right because 4.1.1 officil really sucks! I think I will try the CM 10.1 , but I hope have no problems on the install, I'm a newbie in the android system :s
I'm testing official rom of 14 Dez ( ZT283_H6_1f_1GB_Android4.1_1214_V1.6 ) and I'm happy because it seems all power management stuff  works well, like I said it seems, not for sure. But enters in deep sleep mode even with wifi on , I have Tablet with 2 days 1 hour without charging or power off , of course most of the time sleeping , but the important is that enter in sleep mode, very quickly on idle and when on sleep don't consume battery, also I notice that disable power of USB (when enter in sleep mode). Powering up, on power port works OK, for more info http://www.slatedroi...20121214-jb-rom
This CyanogenMod custom roms have many interesting addons and features, but I need to see tablet without power management issues, understand how leds should work etc, and I may back to CyanogenMod.
Also I'd love participate on development of this custom roms, as a Linux expert I could help out.
 for example https://github.com/m...r/interface.txt