Same as Birddog6...TC's work to redesign and improve their flint locks left nothing overlooked...they are outstsanding as are their redesigned / improved vent liners.
To those improvements, add 3/4" Tom Fuller black english flints, Goex 4f prime, Goex 3F main...and performance wants for nothing...very fast, 100% reliable, long flint life.
I've been using a few of them a lot for 6-7 years now and haven't seen a thing that was overlooked to be improved on.
:thumbsup: