The permits for the Old course had been applied for based on the Fazio routing, so I was "strongly encouraged" to keep the routing pretty close to what they had approvals for. The course sticks to that routing with the following changes:
#3 - green site shorter and moved to left
#4 - tees moved to right [Fazio's plan had a downhill par-3 between #3 and #4, so what's now the 8th hole was #9 coming back to the clubhouse]
#6 - tees moved up so you could carry the creek from the tee [changed from par-5 to par-4]
#12 - tees moved up (shortened hole)
#14 - green moved to right
#9, 10, 18 - reversed direction. Fazio's 10th hole played back up the 18th fairway toward the tee, and his 18th hole played from #10 green to the start of #10 fairway and then doglegged left toward the middle tee on #9, near the lake. I could never figure out what was going to make a player want to play his 18th hole as a dogleg, instead of playing down what is now the 18th fairway on the direct line to cut 50 yards off the hole.
As to Gil's co-design credit for the course, I'm not sure what the club says to anyone anymore. One of the three founders thought he should have a credit on the course when we were done with it, and I did not object to that. But, it bothered me that some people assumed that Gil had really done the course, because he got name credit for it. We both lived in Philadelphia for six months while it was being built, with our families; I spent twice as many days on site at Stonewall as on any project I've built since.