Darkest Night RRIS

I plan on brewing a RRIS (Ridiculous Russian Imperial Stout). Something along the lines of 15-17% ABV with over 125 IBUs. I've never done something like this before and don't even know what the end result will be (or should be). Process wise I don't know if I can ferment a beer that big and have it turn out drinkable. I've scaled up the Dark Day RIS recipe and have been researching a number of different things including "reiterated" mashing. This will be educational to say the least. More to come in the coming weeks...