My experience with CVA flintlocks has not been good. I went through three frizzens. I had the last one resoled. The back side was so sloppy that I regularly took the main spring on and off with my hands. At the end the main spring stayed in place only when in the mortice and the spring was held by the barrel. The frizzen wobbled badly from side to side. No matter how the flint was installed, the frizzen would line up with it.
Back in the '70s when I was fighting this lock, there was no drop-in replacement. I installed a mule ear lock and made the gun percussion.
You may have better luck with your lock; it wouldn't take much to improve on my experience. I would shoot the lock before I swapped it out, but I would not fight it as long as I did. You deserve a good lock.
Regards,
Pletch