The masters from which the molds were made were most likely very precise. The general squareness of the walls is good and most things were probably quite fine. The real problem I had was with the quality of the castings. Since I've made a few myself, I can say that -- at least for me -- I'd produce parts with the same problem if the two halves of the mold weren't quite snugly together, allowing a thin web of material to be created in almost every opening and, for the row boats, extending well beyond the body of the boat. Because of that, just about everything is too thick.
That said -- and most of that can be corrected with sandpaper and #11 Xacto blades -- The windows provided were cheap plastic injection castings that had frames that fit the openings (after the requisite filing and sanding) and about 1/8" around the window intended to fit snugly against the wall and position the window horizontally. Of course, this makes the interior of the building look ridiculous especially given that the building has two dozen windows (yes, I mean 24) through which all of the window backing can be easily seen. Okay, a half-hour or so with a Chopper and I removed the extra material from around the windows and doors so that what remained just fit into the openings.
Ultimately, I'm going to create a building I'll be proud of. But IMO it's taken far too much effort to get it into that shape. These aren't cheap kits and the customer deserves better.
Norm