For completeness of the discussion, Misumi 2020 has totally square-cut slots. The Mini-V wheels *barely* have any contact with the inside of the slot, and require a larger mounting plate (or a shim to pry the Bosch/Rexroth sized carriage open wider). Although they have not de-railed *yet* on my printer, I would say that the use of Misumi 2020 with the Mini-V wheels should be strongly discouraged.....
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