Here is the second rifle, a Stonewall Creek Outfitters stock, .50 Rice 42" B barrel, L&R Classic lock (stock was inletted for it), same York trigger as above. LOP 13 3/4".
New trigger and plate made from 1/8" x 1/2" steel from Tru Value Hardware.
Detail of trigger and plate. The blade hits the sear bar .25" behind the pin. If I make another one, I'll bend the trigger to the side to accept the finger. The front of the plate fits under the tab so that the tang bolt holds the plate and guard into the stock. This allows another 1" longer ram rod hole.
Completed job. There is so much friction in this lock that the weight of pull is still five pounds. The sear and tumbler scour the plate, had to file them and polish the plate and reduce the sear spring tension. Should probably get a new sear, but expect I can file more clearance and reduce pull weight. This was a poorly fitted lock.