Known Kyros Tablets Supported are as follows,
MID7012, MID7015, MID7016, MID7020, MID7022, MID7120, MID7125, MID7127, MID8125, MID1125.
What changes as you can see but the new graphic layout on the task menu info bar. Change the prior B20 to animated volume sliders taking from ICS to give it a fun look. Also when you turn off the cell phone ringer to zero you get the Google Logo will appear. Apps like Volume Booster or Audio Manager can help you out with that one. Both are highly recommended too and they're free.
In Build 30 you now have support for the New KTZ Recovery program created by KTZ forums Developer Vampirefo. So thanks to him we now have our own Backup/Recovery software. But I still support Clockwork Recovery and I know it's a lot of hard work on my part to give you both features too.
Also now fixed is HD support. So with B30 you get both Standard Higher Performance more icons full web view and HD Lower with Larger Graphics to support 720p and 1080p @ 60Hz. Also new is better loading of the ROM with using the new code for faster flashing of your ROM. Very quick now under the Clockwork Recovery.
Other improvements are Launcher I use it now tuned to the overall system performance and inner tweaks for system resources. I do recommend you ditch Memory Manager (Root) for MinFreeManager is also free and set it to Aggressive mode. So your keyboard issues will be gone.
This build does require you to have Bulldog-ice B20 installed prior as B30 is just a small update.
There is now a total of 8 ROM Updates made and I know that seems a lot but if I support both Recoveries your going to need them. Everyone has his or her taste here so there you have it. As for 3G here in the USA COBY tablets don't support it. I have it disabled to free up more system resources. So if those of you in Euro, Asia or else where need it let me know otherwise it's WiFi only Support here!
Enjoy!
Source:
KTZROM 256MB
KTZROM 512MB