You are probably familiar with Acme Co.. It's where Wile E Coyote gets his anvil etc. I needed a fixed cup wrench to work on my Motobecane Le Champion and the one sold by the blue stuff company didn't impress so made the one shown below. The long bolt /washer holds it to the shell&cup and you put a breaker bar or

torque wrench or whatever on the captive hex head. You could probably twist the shell out of the frame if you wanted