I have been keeping an eye in these for a while now and they popped up as a vote on mass drop. I would love to see this succeed because the keyboard is cool and it would be really handy as a portable mech keyboard for work.
The Assembly Process ones are just the Planck and Atomic pre built and done. The regular Planck and Atomic come as kits to assemble yourself however you like. As far as I know you don't get the keycaps in this specific colours, it is all to your personal taste. That image is just an example of a finished one.
Yes. This started a a projects on Deskthority I think. And is to this stage now. Not sure if the PCB is available yet. I have not checked back in a few weeks. It was all hand wired before this and looked really good. The PCB make it a little more expensive but also easier to build. Either way I really want one and the keys are all stable pCB or not as the switches are plate mount.
Oh it does not fit in a case, it is self contained. You can make nicer case if you like but as standard it is either an open bottom on a plate with stand offs to hold the switch plate up or a formed metal bottom to cover the sides. After that you can make a wooden case or 3d print one or what every you like as long as you are able to do it.