Keep posting your modifications and let us help you work on it. BU:GU is the ratio of bittering units to gravity units. So, a beer with 45 IBUs and an OG of 1.045 would have a BU:GU of 1. Likewise, a beer with 30 IBUs and an OG of 1.050 would have a BU:GU of 0.6. So, if you are making an...