Your original gravity looks simply: Massive! but your final gravity is high too. This is a beast of a beer. If 1.056 takes it all the way, then I say go for it. I didnt know it went well over 10 AVB. Your IBUs are perfect and your adjuncts are amazingly compatible. To me this looks like one of the best RIS I have seen.
You say you base it off the KBS, do you mind PMing me the recipe?
I have been looking for it for a while now.
Thanks in advance and Happy brewing to ya.
PS: Needless to say you will want to age this monster for a year or so. I will only get better with time, round and soft like a proper RIS should be