...The sizing of the holes in the plate and bridle are sometimes kinda sloppy...
There is also occasionally too much (for me) play in the tumbler in and out...
I've recently used RPL series locks in place of the original coil-spring locks in a couple of my rifles: a Lyman GPR and a Dixie TMR.
While the L&Rs are, in both cases, a definite improvement over the originals, I do however see several major differences in internal design (see the quote, along with the comments on axle fit, bearings, etc), fit & finish, and overall performance, when compared with the Chambers and Davis locks I've used on other projects.
The L&Rs I've got will do, for the purposes of the rifles I'm using them on (read: near-drop-in fit in an existing mortise); but they're not... well, they're surely not Roller locks.