Just finished, sorting my machine thanks to the above wise man and his assistance!
And now it works perfectly and does wash clothes to a higher standard than my old Miele, or any other machine I've had for that matter.
It takes quite a bit of effort to dismantle and that big slotted nut on the back is a pig to remove (had to borrow a tool from a Dyson wise man to undo it). But once that's done, pretty smooth sailing, only those torx bolts around the edge are a pain, lots of nut release, leave for 15 mins and then TIGHTEN not loosen one at a time. This gives you a bit of leeway to then start to undo them, I managed to undo all of mine in the end.
The casing is then also stuck to the spider and reassess, but with more release spray and lots of flat screw drivers, it is possible to get the spider and the inner drum out. Note you do not need to remove the 3 torx bolts that hold the spider to the inner drum. Then just de-scale everything, clean the yellow slipping ring and put it back together.
Also note, the bearing is massively over engineered and isn’t necessarily the cause of the drum seizing, just lime-scale build-up in the slip joint and inner and outer spiders, if your bearing seal is ok, then the bearing will also be ok (in my humble opinion). They do move a bit with the drum removed -but this is normal, they rely on pressure on both sides to keep then straight. So maybe then just huge de-scaling wash, maybe all you need to fix these machines in future.