I can offer a few suggestions by private message if you like. I've done a considerable amount of experimentation on stovebolt balancers, and I might be able to offer an alternative to a 70 year old item that would allow you to run a wide belt with a newer part.
Jerry


"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!