They're just a German model sub vendor. They tended to make conversion kits for plastic models, but have moved more towards 3d printed hulls in the last couple of years, presumably as it gives a more stable source of supply as plastic kits often go out of production, and also allows them to make larger models.
Most of the industry is cottage based e.g. people working in backyard workshops, as the market is much smaller than comparative areas of the hobby.
