Maybe my math is off but, once the drum is in place, Namoya is expected approx 8k OZ. Now, if they do minor modification to it like TW, it could go more, theoreticaly speaking. According to their last Update, TW did this :
Twangiza poured 8,071 ounces in October, 9,825 ounces in November and 11,549 ounces in December for a fourth quarter 2014 total of 29,445 ounces of gold.
11k for TW is not impossible.