Oh man Sabotloader, you went and done it now. You're gonna love that rocklock.

I hesitate to post anything that's not based on personal experience, but I'm going to throw this out there anyway. So - WARNING - I've read the following in a number of different posts in at least two different forums, but can not attest to its validity.

Early TC flintlocks had a reputation for poor sparking and/or eating flints. Then T/C redesigned their Flint lock assembly in the mid '90s to significantly improve it's performance. The redesigned lock had a slightly longer (higher?) hammer with more of a curve, and the frizzen had a slightly different shape - both of which caused the flint to strike the frizzen at an improved angle for better sparking and longer flint life. TC will replace old style locks with new style locks at no charge.

I don't recall which forum it was in, butseveral months ago I saw a post that had pictures of the new and old style TC locks. Maybe someone here can provide more info on this.