Would like to upgrade 2016 Moomba Mojo - Surf Edition - advertised at 2500 lbs. ballast. How/where is the weight distributed? i.e.What is the weight of the bags in the rear lockers and bow bag? How does that add up to 2500 lbs? When you consider upgrading (adding) ballast do you have to consider that additional ballast to stay within the overall Capacity-Weight of 2,500 lbs. per the owners manual specs? Thanks