Just keep in mind the roleplay will be casual (because being Advanced means you most often get one high quality post a week and that's it), so you won't need to kill yourselves with elaborate posting. Actually, activity is what I'm looking for. I'd love for you guys that are interested to be able to just keep things going and have fun. We don't even need to push the rebellion quickly, if you'd rather just explore the setting for a bit. I'm sure either I or you could make a few subplots within this world. 

Encyclopedic knowledge wouldn't hurt, albeit I have a very similar trait. For example, the use of waterbending to Chi Block is something you fabricated. There is, in no canon continuum, the use of waterbending resulted in blocking chi. It was only through a healing technique via waterbending. However, it would technically be possible to implement chi blocking and use bending, as chi blocking itself is non-genetic fighting style, but that would make the fact the character you mentioned being a water bender an irrelevant fact. In essence, anyone that has the prerequisite agility and training can be a chi blocker, but not just everyone can bend. :D Is that the type of dispute you would try to bring up? If so, I don't really care. The chi blocking in this continuum was actually done with acupuncture where instead of unblocking chi flow, the acupuncturist intentionally blocked it at the order of Phoenix King Azulon. I choose this method because although it is never noted in canon, actual acupuncturists believe that someone unskilled or ignorant that would try to dabble in the field might do more harm than good by blocking of damage chi paths. Using that logic and using hand-placed needles (not metalbending, as with Guo), it's not far-fetched to use this type of fabrication nor would it be unneeded material had I integrated it.

To anyone interested that didn't just boldly call themselves an expert with encyclopedic knowledge, I also welcome you, too. Your characters may come from any walk of life, but I remind you of this. This roleplay is an AU and is up to my interpretation. If you alter the core of a bending style and use it in a new, creative way, it may have unforeseen drawbacks and may actually dilute the bending style. I intend for Bending Masters, like Pakku (formerly), Ozai, Monk Teyri-yhama, Iroh, ect. to be the most powerful in their field using the traditional methods past down by those that originally learned bending from their predecessors, ie the Dragons and/or Air Bison. But, as we all know, you don't have to be the most powerful to be a complete badass and you don't have to be Avatar-level to influence the world. That is what this roleplay is about. That said, take these things into consideration. I'm going to be adding in some elements of my own, especially to Airbending as my personal character will be one. I will have the OOC up for all of you and include a CS shortly.

Thanks for your time.