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So I’ve been inactive from this forum for a while, including the time this thread was made....
I have a magnetic MFJS, and the QiYi one can be magnetized too. You just have to use an edge center scheme for the MFJS and drill holes into the flat bits on the edges. I think the QiYi can be done like a normal cube, but I haven’t checked the mech yet. Hopefully this clears it up for anyone looking to make one.