My mags are a little looser when empty, I'm assuming they're supposed to bulge a little when loaded. If it's the same play as your WASR you should be fine, my VZ2008 has about the same mag wobble as my WASR as well. I'm not aware of any Century VZ having enough mag wobble to be a functional issue, and a little wobble is good. I have a few Tapco 20s I had to file down to fit my WASR and they go in smoothly but there's so little excess play they don't insert as fast as my steel mags, so a little wobble is good IMHO. As for finish, I don't think any of the Century rifles had the grey paint finish the real CZs had. There are several older threads on the folder, some have taken the folder apart and others like me just ran a lot of CLP thru it while working the hinge, the insides of the parts are parkerized and you'll get a lot of grey gritty sludge out of it but it smooths out nicely. Still kinda tricky to release so don't put any pressure on the stock when you're pressing the release button. As for tabbing the carrier, you do not have to send in the whole rifle, just the carrier. I haven't tabbed mine yet and after 500 rounds downrange still passes the 'gremlin' test so I'm not worrying about it.