It's kind of funny that that image looks an awful lot like the housing of a Mazda rotary engine. I'd be curious if MIT / Commenwealth Fusion have made any prog

It's kind of funny that that image looks an awful lot like the housing of a Mazda rotary engine. I'd be curious if MIT / Commenwealth Fusion have made any progress on their "remountable magnets" approach. The problem is that if you have to replace parts of the reactor, the magnets get in the way. I think they found that you could just solder the ends of REBCO film to each other and even though the solder isn't superconducting, the layer can be thin enough that it doesn't matter. So, they were looking at technology to take a tokomak apart by desoldering the REBCO, then they can replace whatever parts are inside, then solder it back together when they're done. That seemed like a pretty hard problem, and not one they're trying to solve with SPARC (which is only meant to be a cheap prototype reactor, not something designed for a long service lifetime).