Over years and years of shooting CAS/WAS there are two gun failures that are most common. One is with 97s failing to eject, although there are various other malfunctions that also happen. VERY few folks seem to have 97s that ALWAYS function correctly. For most folks, I cannot and will not recommend 97s, no matter when or where made, or who did what to them.
The one thing that many folks in CAS/WAS do that is considered "gun abuse" in other shooting sports is literally slam open and closed 97s and doubles (rifles and revolvers get their fail share of same kind of abuse). Great way to batter parts, especially on older guns with softer steels, and start that gun down the path to failure. IF you are willing to develop a technique that avoids the slaming open and closed, then you can expect less battering and breakage.
Lars