I have been reading a lot of posts about ribs and I have a few questions. Thanks in advance for the help guys. 1. Do you have to trim BB's or only spare ribs? 2. Going to use yellow mustard, then Jeff's rub. Do I need the mustard? 3. Going to try 2-2-1, so can I spray with apple juice every half hour? 4. When I foil them do I spray the foil or ribs prior to them going in there? 5. Do you use thermometer for ribs or are they normally same size and done in about five hours?