I only own one L&R lock, an 'Early Classic' that was selected by the builder of my early VA rifle. Firstly, I've won lots of ribbons at our monthly club shoots over the 18 months with it, so the gun, including the lock can't be too bad. However, I know that lock isn't working quite right. It's main problem is with flint life. After 5 shots on a new flint, all bets are off with respect to whether the pan is going to flash. I've tried English Flints and Rich P's flints. I've tried the recommended 3/4" flints and also 5/8" flints. My current theory is the problem has more to do with the angle the edge is grazing the frizzen than frizzen hardness, spring strengths, etc. And, after those first few shots, another 10 or 15 shots can be coaxed out of a flint by knapping, swapping bevel up/down, etc. Still, it would be really nice to start an aggregate or woodswalk without knowing you had one or two flint exchanges in store. The second problem, which may be due to the set trigger rather than the lock, is that sometimes the hammer doesn't fall after a trigger pull. I have noticed that when you get one 'click' , others will probably follow, and that when I pull the lock later, the tumbler screw is backed out a little. Like I said, may be the trigger, but on the rifle, the triggerguard pin doesn't seem to have been drilled all the way through to allow it to be pushed out, so I haven't felt like trying to figure out how to get the pin out without marring the stock.
Anyway, those are the tech faults I'm working on with my L&R. SCL