Hi Hugh,
Thank you for the information on the need for proper spring tension on the frizzen.
Years ago, I was told by a well respected author ( black powder ) that there was no need for said spring.
Through all my shooting years, my clatch locks always worked better with the frizzen springs intact.
In years gone by, I have shot too many imported ( cheap ) BP guns to know the value of a well made in the USA lock.
I have seen and used some British, German, and Swiss locks that are as well made, but they are very hard to find here in North America.
Best regards
Old Ford