Thanks Seth for sharing the photo of the original porch. That is a great looking porch.
As to the process, from what I see, I would have used a photograph, then correct tilt/visual errors and get the proportions exact in Photoshop. I would have imported the photo into Aspire, and then manually placed vectors/nodes in Aspire on top of the photo. Then I would have done any visual touch-ups on the vector image to fill in any missing parts. But that is just what I would have done. You have to do, of course, what you can do with the tools that you have.
Now, since you mentioned that you may be able to reuse some of the originals..... I have seen where original parts are still on a building, new ones are made, and all the old ones are dumped. The problem is for future historians. Any old house investigators would instantly see that the brackets are not original, based on materials used, their total freedom from old paint, and the thin dimensions not filling the old spaces/paint lines on the porch. Then they wonder, how well was this reproduced? Maybe this is nothing like what was originally here...…. So as a historic example, the value of that house will be diminished, because without photographic evidence, no one will reliably know what was originally there. If you can re-use the best original, you will have left an important artifact for future architectural historians. Any old house expert will quickly spot the original. And at the worst, if the original best bracket goes into the attic, with notes written on to the part... Though such things can easily get thrown away by some clod 30 years from now cleaning out the attic.
Sorry, I have digressed, but such points are interesting aspects of working on old houses, and realizing that you are helping to preserve things for the future.
Also, as to your small pictures, I don't know.
Thanks again, Chuck
Chuck Keysor (circa 1956)
PRT Alpha 60" x 144" (circa 2004)
Columbo 5HP spindle
Aspire 9.0, Rhino 5