Local store had mr beer refill kits on sale. 2 refills for $12. Each refill is 2 gallons. Im going to use both of them to make 4 gallons. The recipe is canadian draft. So i was thinking of adding 2lbs of dme, and also adding the booster that come with it, Give it more body and up the abv. Will i need to add some hops to balance out the extra dme? Or is there a better route to take?