Ok fellas, TTB got back to me. I can help if anybody else is curious:
This is for smaller breweries, sub-10K bbl/year.
Form 5130.26, turned in quarterly, to the Cincinnati TTB address.
Form 5000.24, you must qualify and be in the system as quarterly, or you are semi-monthly. Use serial number field as YEAR-#, so 2016-4 for 4th quarter 2016, in my case 2016-1, because it is my FIRST payment of the year. These are due by the 13th-14th after quarter end: https://www.ttb.gov/tax_audit/fed_ex_tax_due.shtml
Pay.gov must be set up by TTB personally for brewery payments. You must pay 48 hours prior to deadline, or postmark on the day of the deadline.
5000.24 will switch to annual in 2017 for qualifying breweries. Here is help on that form:
The $1,000 bond will not be required for qualifying breweries:
Hope that helps.