I cannot comment on the build process of any of the wooden kits of Vasa (except to reflect the experiences of modellers who have written to me with cries for help on their Corel and Billing kits), but can comment on accuracy. Most of the older wooden kits (Corel, Billing, Mantua) were designed before the ship had been completely restored, and so feature a lot of conjecture about the upper works, beakhead and sterncastle, as well as the rigging. None of them get the hull form exactly right, although Billing is probably the closest. No criticism implied here, the kits simply predate the availability of good data.
The d'Agostini kit (which is actually made by Artesania Latina) was developed in cooperation with our research staff (I supplied many of the basic drawings, including data from three-dimensionsl scans of the hull). I would say it is reasonably accurate in terms of hull form, dimensions, and overall configuration. There are some concessions to scale and the process AL uses to make parts, as well as to make it possible to sell the kit in the installment format where nothing is larger than an A4 shipping card, but these were mostly rational choices with little visible impact on the finished result. There is also some mass-production quality to the cast metal sculptures, since it was not practical to make 786 unique, individual castings, but this is not very noticeable if one varies the painting as in the original. There are some small detail inaccuracies, in cases where AL used stock parts rather than tool new moulds (the rigging mostly uses standard blocks rather than the wide range of specialized types, for example), and there are some odd misses, such as painting the gun carriages red when we know they were black. The rigging is simplified quite a bit in the interest of making it less of a nightware for beginners. But all in all, it is easily the most accurate kit available in wood, and is a reasonable base for an enhanced model.
By the way, in the maritime museum world, we do not use the term "museum quality" to describe models, since we collect all sorts of models, from primitive folk art up to the most detailed scale replicas. Museums do set standards for models they commission, but these can vary, depending on the intended use. From my own experience, I know that when the Smithsonian commissioned a large series of models for a gallery of American maritime history (way back in the 1960s), all to the same scale, they included a set of standards that were given to the builders, so that the models would reflect a similar level of detail, and the museum provided the plans (many by Howard Chapelle). These standards later became widespread, as the resulting models were a good balance of detail and scale. They included such criteria as the use of durable materials, and how closely the result should match the plans, as well as how fine the detail should be (I think I remember that any feature that would be larger than 1/8" on the model had to be present). Mystic Seaport Museum did something similar, when they embarked on a series of models at the same scale to show the development of American fishing vessels, and the museum's in-house model builders had a set of standards that they applied to models made for exhibits. The model shop at the Swedish National Maritime Museum currently has a loose set of standards as well, but like all others, they vary depending on how the model will be used.
Fred Hocker
Director of Research, Vasa Museum