I purchased copies of the drawings available from the Hagley Museum or the Delaware State Archives. I have the framing plans for Combine 1, Coach 2 or 3, and Combine 6. The plans do not show end elevations nor do they show underbody details such as brake rigging. While the framing plans are nice, it is the small details such as window dimensions, interior trim, and clerestory roof construction that will take more time to replicate. And, as mentioned in this thread, the castings required will take some time.