I have an older Moomba Outback DD, and I'm thinking about rebuilding the rear (where the seats are) to accommodate some built-in ballast.
You can kind of see the seats in the pic below. I'm thinking about building up a "platform", just big enough to fit a custom fly high sac. Then reattaching the seats to the platform.
Has anybody else done this or seen it done? I'm looking for some inspiration here.