Am I looking at this all wrong? I'm thinking of getting the EM806 or AM882 80v drivers, I have a 2 x 25v toroidal transformer and 4700mf 100v caps and rectifier to build the PSU which should deliver 68v, I am scratching my head at what stepper motors I should get to match the Power supply....if those 3.1Nm steppers only require 57v would I be better to go for 50v drivers and a smaller PSU?