Greetings, Got my hands on a 1700 Blunderbuss thats been in the family for decades. I would like to make go "Boom", dad said he shot it back in the 50's. Put in a new flint but no spark. Don't want to mess up the original frizzen trying to harden it, most posts say thats the problem. Are the after market replacement frizzens all pretty much the same ?