The PiCube YJ MGC 7x7 is a custom core magnetic version of the MGC 7x7, it improves on the performance of the regular MGC 7x7 but I feel they have gone slightly overboard on the strength of the core magnets. I personally still prefer the PiCube AoFu WRM as it is smaller and seems to be faster, although set up may have an impact on that.
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