We've been looking at hydraulic cranes but they are not cheap and the location, while acceptable, did leave us with kind of a big ugly object in the line of sight forward.
Since we have a pretty strong forward mast anyway, our designers at Herman Jansen made this suggestion - a boom - and we like it a lot. It's a lot more affordable while able to carry higher loads. It also looks a lot better we think.
We can't use the same set up behind the mast because it would reduce the safe area to land a helicopter. Maybe a small hydraulic low profile (stiff) boom crane after all? We'll figure something out.