Glenn, I have a pair of stalking safeties on my Lang double rifle and to tell you the truth, more useless accoutrements, I've never seen. Well, that may be a bit of an overstatement, but I sure don't consider them "stalking" safeties. Having to switch them off and then cock the hammers too, just doesn't make sense to me. Were they installed at full cock, they would make much more sense to me.
I'ver tried cocking the hammers with a branch - and, let's just say, I think this is a solution in search of a problem.
They do look cool though.
Brent