Again your great knowledge is showing, there is some clearance in the TCA swivel mounting bolts, the console mounting bolts and the top mounting bolts - all of that was built into the design so that the cars did not need to be built "spot-on".
You are correct to say that, in essence, these cars do not have adjustable camber in their standard form - but as I've said above, a slight agressive camber setting can be achieved, on both sides and with the alignment being "true" - and that setting can be enough to trash the inner edge of the front tyres under normal driving.
I know that there is fact and urban myth, but the last results for my wife's Polo pre re-alignment showed that the previous alignment had been "good" but just a bit agressive with the camber, since that work has been done the tyres are wearing "flat" - ie even.
OK, if you want me to be pedantic, then yes, there will be a small amount of adjustment for camber due to bolt holes always being a bit larger. And, again being pedantic, its impossible for me to say how much adjustment would be available on your car compared to mine, or on any other on the site. But for all intents and purposes it doesn't have adjustable camber.
On my car (I wont bother mentioning other cars I've worked on since I dont think I've done another
Ibiza) there wasnt enough adjustment as standard to remove half a degree of camber. I cant ever say for definite but I'm fairly confident that there wont be many standard cars where you could adjust for half a degree of camber.
Still being pedantic (seeing as its how you like it), if you're tyres are wearing perfectly flat, then you must have 0degrees camber and a toe setting allowing 0degrees when the cars under load.
That would be a wonderful setting for tyre wear, but your car would be skittish as hell, and understeer like a pig.
These cars have a reasonably heavy front camber to allow for sharper turn in and to reduce understeer as much as possible (dont even start me on Seat skimping on decent suspension mods and just increasing camber)
I personally have no more to say. As usual, everything read on an internet forum is gospel. And all tuners, always advise you on the best things to do on your car. None of them are just out there to make money.
Anyone with sense, in the situation of the original poster, will take his car and have the front tracking adjusted with the rears taken into account.
And all of those who have more money than sense, will continue to throw it away on everything they read on an internet forum.