- Is it typically a requirement to have latticed internal volumes to reduce material costs?
In my experience, the model have to be solid and without internal meshes. The material cost can be controlled with the percentage and the type of the infill.
- What about dowels/pins so that the model can be assembled? Do people usually want this?
If you're printing a bone model in two parts, its better to glue them together after the print. If you're printing a model with a important cavity (skull or aorta), pins or sockets for neodymium magnets are a choice, which guarantees good alignment for the parts of the model and increases usability. The magnets are better, unless your client specifically prefer pins.
- Are there any other considerations that would make these models more valuable to the community - I potentially have a few more anatomies that could be of value. Make them shinier, more stable and design a stand for the model.