I don't understand. What is JUNK about that lock?
I do see it doesn't have quite enough curl, ie: the "throw" is too long.
It doesn't take much to make a cap pop.
among other things, it is too short on the hammer throw (fixable, of course), it has a very light mainspring (sort of fixable of course), the tail of the sear is too short to be struck by the front trigger bar (sort of fixable but not really), it has no half cock (fixable, but not really).
It failed to fire more than 50% of the time (try shooting a match with THAT, never mind a bull elk). So, while a lot of welding, brazing, bending, and spring making could fix this lock, it ain't worth it. As Bob notes, even fixed up, it would still not be a lock I would want. Thus, a new lock was in order, and so it is.
Truth be told, I may also have a chip on my shoulder about anything labeled Deer Creek when it comes to muzzleloading rifles (I have another), though I recognize not all Deer Creeks may be the same.
I'm pretty happy with the replacement so far. Now to get it finished and then off to the range and the deer woods with it.