The WR ejector system (aka Deeley box) is about as reliable as an ejector system can be. The inner workings of the box is basically a miniature version of the A&D system that makes up the boxlock action. Recently a friend of mine took his A&D boxlock into the shop for a strip and clean. He hasn't owned the gun for very long, I checked the gun out for him when he got it in and everything worked fine. A few months later he noticed that the ejectors were out of time. After about 10 minutes in the gunmakers hands, the ejectors were working fine again. There is a little pin that holds the works together, this pin had become ever so slightly loose and drifted out just a hair, enough to obviously throw the timing of the works off. A gentle tap to re-set the pin into is proper place and the ejectors worked like new again. Replacement springs for the system are not too difficult to make, any gunmaker who understands the boxlock system and can make springs should be able to make it right again with little trouble.
An example...notice the pin placements, for both "hammer" and "sear", just like a boxlock action