I suppose it might be possible for a small slab to be put down...

I suppose it might be possible for a small slab to be put down precise enough for those blocks to not need anything other than glue if you got a really good concreter who spends a lot of time on it making it perfect, maybe. Though it adds increased costs, that and even in Australia you don't need a qualification to be a concreter so someone who could actually do it might be few and far between. Any concreters here might be able to correct me if i am wrong.

Im my opinion, for the HX to become a viable option in the industry and not just a niche product it needs to be able to roll up to a standard house slab and just work.