Weiss never should have doubted Ruby.
She knew that Ruby was a skilled weaponsmith; she could see it in the complexity of her weapon and how careful she was in maintaining it. Still, she was hesitant when Ruby asked to work on Myrtenaster.
However, seeing the results, she couldn't have been happier to have said yes. She got to watch Ruby examine her weapon, and Ruby always asked for permission before making adjustments. Now the dust vials clicked in place easier, and the revolving chamber spun with more precision than ever.
Needless to say, Weiss had found a new weaponsmith.