I did this ^^^ and it helped me tremendously to find my stroke issues. The first time I spent hours making 10-20% until I found my issues.
Another thing that helped was to see if I was even addressing the ball correctly. Aim looks good, get in position and the tip is hitting center, then...
Update: Overall happy with the outcome. I had an agreement with the customer if he didn't mind it not being an exact match I wouldn't charge for the rings. I was looking for the practice and experience.
As stated by others contacting Ariel would have been a good idea. He must use sterling...