I’d be keeping the 900. My local tile shop sells a lot of these damn 800 porcelain tiles and I’ve got some work booked in already installing them. I have to consider landing space if I’m doing a main
bathroom.
The 1200 would just be a luxury item for me so I’m not going for it as I don’t get enough that size. Another small porcel-thin job booked for the new year and I find my flash line deals with the thin tiles of that size very well. That said, it’s the only rail I’ve used so not much to compare to. I won’t go any larger than 1200mm tiles. That’s my limit.