Always remember to do what most historians are trying so hard to find right now, document, document, document. Take pictures, make notes, save designs. As you move forward in the future, if you truly want to hold on to what you are now getting, always keep the proof of the end product close at hand. And remain in close ties with your architect. As questions come up about changes in design and "keeping with the times" he will be the expert opinion from which you need to draw and it was his vision (or interpretation of an eariler ODG vision) that restored the course to it's original charm.
I know at Meadow Club, when I was there, I took tons of pictures, as did the assistant. One unique thing we did after enlarging all the greens back to their original sizes was to go around and measure the distance from the green edge to as permanent a landmark as you can find (we used the greenside sprinklers as there is really no reason to ever move those) in order to make sure you retain the size of the restored green over time. You'd be amazed how much simple daily greens mowing can change the shape and size of your greens.