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How are these motors? http://reprapworld.com/?products_details&products_id/424/cPath/1614#.Vb5qNPl4uLk
they are advised in the RepRap wiki: http://reprap.org/wiki/NEMA_17_Stepper_motor

Hi, I'm building a Prusa i3, are good this motor?
http://it.aliexpress.com/item/5pcs-4-lead-Nema17-Stepper-Motor-42-motor-Nema-17-motor-42BYGH-1-7A-17HS4401-motor/1849871491.html
Thanks