My first CS70 also had a fence that wasn't perpendicular to the table anymore, but in my case it slanted away from the blade; I was planning on sending it into service because it was having a few other problems (it was 8 years old, but it got stolen from a jobsite before I got to it).
I noticed it when I had to make a lot of thin rips, and was referencing of the fence instead of the table; later I worked around it by using wider material if I needed thin rips (If the stock is alreay thin; you can't reference of the table, because of the opening where the blade travels for pull-cuts).
I can see that in your case it is more annoying, even when setting the width. (if it slants away, you can just measure at the table, if it slants towards the blade, you'd have to measure at the thickness of your stock (I don't remember by how much mine was off, but I'm guessing more than 0.25mm)
Does it make a difference if you use a different V-groove? (front or side)
The slot in the table is NOT a miterslot, but for clamping.
The accuracy has always been good enough for my needs, (I'm just a carpenter, not a cabinetmaker) I never had to calibrate the miterguage on my first saw. (which I had to do on my kapex after 6 months of use).
I also have a Nobex, I remember I really didn't like the accuracy when I needed to trim just a bit extra off an already cut miter.
![Wink [wink]](https://www.festoolownersgroup.com/Smileys/default/winksmiley.gif)
If the fence bends when making ripcuts, you're putting too much pressure towards the fence (more than needed). (I also have the ripfence that clamps at both sides, but rarely use it, because it's a hassle to switch from ripping to crosscutting)
I do feel that the build quality of my second CS70 is not up to par with the old one, I had to fix the leveling foot to keep it from turning inside the leg and thus lowering the saw; and at startup the blade shivers a bit (the cuts are still accurate, but if I install one of those green anti-splinterblocks, it will get damaged. And the free accessory, the transporting wheels were in a damaged box and one of them turns really hard (but hey, you can't look a given horse in the mouth)
(I wanted to send it back the week after I got it, because the festool rep would be at the dealer I got the saw from; but meanwhile my father managed to cut into the fence
![Eek! [eek]](https://www.festoolownersgroup.com/Smileys/default/eek.gif)
and he also tried to bevel the saw with a splinterblock installed I think, because there are teethmarks on the part you swivel up to change the blade; so the fact that the shivering was there from the factory became a lot less plausible)
As for the blade change, it takes a few more steps, but it looks a lot more comfortable than on a mafell erica. (Plenty of room, from above the table, and you can use a regular spanner on the arbornut aswell, in case it has gotten too stuck)