Are you sure?  Best I can tell, that is automatic and the quote I pulled from the FAQ specifically says manually.  Moreover, (also best I can tell), all numbers based on ~twmz are for generate transactions and I am operating on the assumption that buffer funds are previously generated and must be payed out (as opposed to being generated in the new Eligius blocks) even if the behavior were automatic.  It is certainly possible that I missed something glaringly obvious, but I don't think ~twmz has anything to do with the buffer, and the quote from Luke-Jr doesn't appear to indicate otherwise (assuming payout queue = automatic / generate queue).