Usually, with the cock at half cock and the frizzen closed the flint should just be about to touch the surface.
With the flint mounted with the bevel (chamfer) up, the lower flat surface of the flint should be about 25-35 degrees to the frizzen.
This should allow it to cut lightly into the flat face to cut away small pieces of steel.
This varies with the lock and all of them seem to have their own quirks. Some locks also work better with the flint bevel down and the flat surface on top.
The only way to find out which way your lock likes is to try it.
After reading your posts, it looks like your on the right track. Now the only thing you need to do is to do some more shooting.
Stay cool and have fun.
With the flint mounted with the bevel (chamfer) up, the lower flat surface of the flint should be about 25-35 degrees to the frizzen.
This should allow it to cut lightly into the flat face to cut away small pieces of steel.
This varies with the lock and all of them seem to have their own quirks. Some locks also work better with the flint bevel down and the flat surface on top.
The only way to find out which way your lock likes is to try it.
After reading your posts, it looks like your on the right track. Now the only thing you need to do is to do some more shooting.
Stay cool and have fun.