Jim, so far the fit problems I've encountered have been fairly minor, and nothing that a few minutes in Photoshop can't cure. As always, the devil lies in the details (more specifically, the lack thereof). 2D depictions that look ok in 400 scale start to look pretty cheesy in 250, and omitted details (such as electrical distribution boxes) start crying out to be added. To get a really great model from a JSC enlargement requires a lot more effort that most people are going to put into it, So far, the best approach I've found is to enlarge the kit and build it without modification (as I'm doing with this build string) to find out where the fit problems are and to use as a guide for the redraw (for example, to identify the parts that really need to be colored on the back side of the parts, like railings, and allow identification of the model's focal points where 2D details really need to be worked into 3D parts. You really need to enjoy working with computer graphics to go down this path, but it sure seems to be a good way of developing fundamental graphics skills before branching out into doing original design work....which is where I eventually want to go once I have enough retirement income I can afford to pursue a job I like rather than one I need to suffer through in order to keep the bills paid.