L&R T/C RPL lock clip and pics link posted below
https://imgur.com/gallery/wy4WDEHIt did not come in good shape, the tumbler was ground off axis and digging into the plate and the hammer was skewed. My biggest issue was the flint had to be offset in the jaws in order to hit the frizzen. After several days of stoning and filing internal parts I had something that worked well.
Are all L&R like this, I don't know. I do know that as sold it was a more reliable sparker than the original T/C lock, but the flint would frequently be knocked loose.
The end result is a big improvement and fires reliably. As big an improvement as it is, a new untouched Chambers is still significantly better with stronger springs that sparks even better, but maybe harder on flints. If I had to do it again, I would get a Chambers makers lock and do my best to fit the plate so the bolster and sear lever are positioned correctly as I think it would be less work.
I think if you can hold it in your hands and put a new flint in and fire it 10x with good sparks and without any issues like the flint shattering you're good.
Edit: I did not alter the springs other than removing a bit of the width to allow for the slightly narrowed linkage because of the slightly narrowed tumbler. The frizzen came in great shape and sparks well. The only thing I did to the frizzen (and the other externals) was polish and hit it with a torch to give it a bit of color after polishing, but not enough heat to soften the face.