Well, this is the stride. If I remember (I watched the video weeks ago) building them smaller, with the steel part of the tape doing a lot of the work means you

Well, this is the stride. If I remember (I watched the video weeks ago) building them smaller, with the steel part of the tape doing a lot of the work means you can build and swap modules to create a far smaller tokamok or stellerator that you can immerse. The same topologies can and would be used - perhaps with more stable containment (for reasons I forget.)