I was thinking about the mass of the Chesapeake Sea Monster. My rough weigh-in of parts is around 17 oz w/o any nose weight, and motors. I bet it will come in around 20 oz. The motors will weigh about 14 oz. So, how much weight can five D12's and eight C6's lift? Luckily, there is a calculator for that at rocketreviews.com. The calculator says the equivalent motor is a 155G83 (93% G). An average thrust of 18 lbs says the rocket can weigh up to 3.6 lbs (57 oz)! Looks like weight won't be an issue unless that nose weight bites me.