Long time lurker. Finally joined to say thanks for this build. My wife has medical issues and has had many MRIs in a short time. This was a must build. We've brought when going for scans. The technicians always get a kick out of it, and it makes everything less stressful. Frustrating that TLG has been so cagey about this set. They should be getting it into as many hands as possible.
This build is much closer to the actually set than the instructions that were on ReBrickable for a short time. No rare parts either, even the medical torsos were on PaB. There seems to be multiple parts lists, that vary how the white walls are built. Some have extra plates on top. You can see the difference between the boxed version and the actual photos. The only tweaking I did was to add those plates, and it improved stability.
What really got me to comment is that there are now two for these sets on eBay: item# 276908211992 and item# 297066875861 There are photos of the complete box. Far out of my price range, but very curious as to what is in the box. Everything I have read seems to say they were hand-picked and pre-built, so I wonder if there is even anything resembling "proper instructions".