I think that this slightly "off topic" discussion should go quiet for a while, I also think that most of "us" will have seen that thread on Briskoda as we do generally tend to "look around" - I have been on Briskoda longer than I've been on this forum - and I'm a VW owner! It really all down to the wording as you will probably agree that "four wheel alignment" is not the "top of the tree" alignment activity - its just one step ahead of "front camber + toe-ing" - which itself is not really enough for these cars. I'd say that both myself and vroomtshh have not exactly made ourselves clear to each other! My main concern here is, as a serious DIYer, I took one look at the 9N Polo and one read of the Fabia Haynes book (only one out at that time) and thought - "oh, even if I do drop the crossmember and replace the ARB, I'd then need to get the alignment checked/adjusted - and VW would probably hit me for about 90% of the job cost - I mean = remove u/s ARB > replace supplied ARB > align suspension"- in the event, as it was winter and just days before Christmas I just "handed it in" - and coughed up. It did come back with the steering wheel off-set and did not feel as good as it had originally - but other things took priority and I just let it be as the tyres were going to be replaced within 9 months and I was going to get the sloppy TCA bushes replaced - and that would mean another alignment, but this time at a VAG indie place. After new tyres and new TCA bushes the car felt good again - only thing was about 10,000 miles later the front tyres got their inside edges trashed just in time for MOT! So I let VW sort it after I took it away and replaced the front tyres. Their before and after readings showed that the centring was good, camber was equal but a bit near the "outer" limit and caster was out of spec a bit. So it seems that they moved things about a bit - I know there is very little "adjustment" - anyway, the "after" readings showed that they had managed to get camber and caster "in a bit" and the car still feels good and has "even" (that means acceptable) wear on the front tyres. Now it does not matter what any expert, like the guy that wrote that thread in Briskoda says - he is talking in theoretical terms, what most of us need to understand is that no readings are exactly repeatable - setting these alignment benches up relies on a human being regardless of how well he/her does. So that could be that a "dubious" aligner could take a set of reading, have a quick work out with some tools and repeat the readings - and see that they have "improved" - job done.
One general Seat alignment issue I had:- daughter bought secondhand
Ibiza 6K (completely differant suspension set up to
Ibiza 6L) - THEY DO HAVE CAMBER ADJUSTMENT - well big bolts/small bolts and one bolt on each side is called camber adjusting bolt I seem to remember. I took it to KwikFit to get the tracking done - went to pick it up, guy said "come and see this - slight negative camber one side vertical the other side - you need to take this to Seat to get the camber adjusted" - well he was right - why hadn't I taken the effort to look at that first (can't comment!), anyway booked it into Seat, phoned up 4 hours later "no
problem sir its just the camber of the roads - head tech has been out for a test drive" - I said that they should get the head tech to stand in front of it and have a look please as I was paying the bill, answer came back "you are correct but there is no camber adjustment on these car" I replied that a couple of bolts are called camber bolts or soomething like that - they huff and puffed and said that they had got their "suspension man" on to another jib so I have to wait a bit longer! I phoned back a couple of hours later "one of the sensor harnesses is not working on our jig - what do you want us to do?" I replied that they should look at the job sheet and "make it happen" as the car was booked in for 08:00 and it was now after 14:00!! They had to take it to another branch and use their kit, at about 18:00 I strolled into the
service reception desk, "your car has just been sorted" I asked what was wrong with it - "needed the camber adjusted" - how did you manage that - "slacked off the camber bolts and moved the strut out a bit". So, even the
dealers get it wrong - that was a serious waste of a day's holiday for me - but the car ended up being sorted - but only because I forced them into sorting it - even although it was me that was paying for this. This car had obviously had the usual "kerb clout" prior to being sold to my daughter.