That was a good video, Bob. Thanks.Another way, a quicker way of knapping the flint is to use the bottom edge/corner of the frizzen against the flint's edge. Oft times, there will be a rounded, hard spot on theflint that is preventing the flint from striking sparks off the frizzen. This method works well with English or French flints. The Missouri Chert, being harder/tougherthis method is less successful. Bring the cock to 1/2 bent and with the other hand lower the frizzen and meet the front edge of the flint, and push down on the frizzen. With English and French flints this is all the knapping needed - usually, and is much faster & easier to do that to fishing out your knapping hammer or rod.This is only a suggestion and is the first method I use- always, when needing attention to my flint's edge.As the bottom of the frizzen is square to the rifle, this usually results in a perfectly square angle of the front of the flint.