Did somebody say
cone wrench?
Well, I ran out to the garage and tried it. Guess what? The 14mm wrenches were just a tiny bit too small. A 14mm Craftsman open end wrench
barely fit on the flats (with the backing plate off) but the PC is really 9/16”.
I’m sure the cone wrench would fit with the slightest amount of honing. Maybe a different model or manufacturer’s would be fine.
That’s a good thing to know since cone wrenches are easy to find in any local bike shop.
PC.