1) better on the duokan thread to ask that really... but basically I believe they have KUAL support now. OH look here we are!
2) hmm... well.. the device should, regardless of duokan
3) eerrrr... you got me on that one. I reckon it might be in a TZ file but that is a guess... its 24H by default I think *looks at his UK one* well mine is... get back to you on that.
You need to Downgrade it. to 5.3.1 Then JB, (with bridge), then upgrade. Takes not very long. ten/twenty mins or something. Longer to find all the right files/threads : D
And I would have just moved the post for you...
No need to cross-post on here...
Only reason I didn't do that is because I thought I had already provided your answers?
Anyways. Good luck on finding "better" answers