It's always seemed like Taurus's revolvers were some of their better offerings. Not because they're GREAT, but because they've always seemed to work...and revolver guts are hell of a lot harder to build than typical semiauto guts.
That's what confuses me a lot...it's just not that hard to build a semiauto that works. I've personally dealt with zero that ever had more than minor, easily fixed problems. Does the slide fully cycle? Is the feed ramp smooth? Magazine lips unbent? If yes to all, then it PROBABLY works fine. How someone's QC could be bad enough to come out with these constantly jamming guns (when others of the same model sometimes work just fine), I dunno. It seems like it always related to issues with the owner.
Maybe the gun came from the factory needing a little 'break-in.' Maybe that manufacturer uses copious amounts of shitty packing grease. IMO, if you can't overcome minor issues like that, you probably shouldn't own guns. And god fordbid the same people actually DO get one with a bad part...they'll probably never find it. Whether they are completely 'at fault' or not, shitty gun owners are the reason there is so much dubious gun info on the internet.
Re: tool marks...there's a differenence between 'they forgot to finish machining this part' (a big QC issue that I'd prefer not to see from anyone I'd buy a firearm from) and 'there are marks inside this gun.' A lot of respected manufacturers are well-known to be lazy with non-critical parts. Obviously I follow CZ stuff a lot, and CZ has always seems very known for leaving rough spots in hidden areas. It's just not a problem. The clones I own ALL look prettier inside, and they function damn good...but if I had to pick something to have for a long time and depend on...I'd probably take the genuine CZ.