I've only made a few batches of beer. I have a pale ale that is ready for priming but it's not a full 5 gallons; more like 4-1/2 to 4-2/3 of a gallon. I'm going to use light DME to prime with. Is it okay to use 1-1/4 cups of DME or should I use less? If so, how much less? Or should I just have another beer and quit worrying about it?!