Updates on some details I have received:
The rails that are mentioned in the Snapmaker published material on this topic up until this point are not rails at all. They are simply standard aluminum extrusions or profiles and not linear rails which I felt is a bit misleading. Further details on the enclosure including a manual and photos can be found in the thread below:
There seems to be some progress on using modules/heads from the Snapmaker 1 with the Snapmaker 2 system:
> For users who want to purchase a bigger machine, Snapmaker 2 Standard or Plus, while reusing the original 3D printing/laser/CNC module, it is possible! We can design a specific adapter for them so that they can connect the original head module onto Snapmaker 2. They will have the option to buy the complete kit of Snapmaker 2 or the kit that without three heads. But it is most likely that other modules in the Snapmaker 1 won’t be interchangeable with those in Snapmaker 2.