Custom spiral balance
A quick learner from West Deptford, NJ says:
September 6, 2016
Tom from SWISCO responded:
September 7, 2016
Hey, Sharon. I don't think this needs to be custom made. Many older spiral balances were made on the 1/2", but over the years manufacturers switched over to making them on the full inch. In your case, I think you'll be okay if you bump it up to the 29" long S900-29. That is what we usually do and it works out great.