I have the Gradus but Panucatt stiffed me one of the bigfoot drivers and all the heat sinks. Kind of thinking I should just get the tinyg and use something plenty well documented which the Gradus is not. This is for an OX CNC with fairly lightweight NEMA 23s. I don't think I need to go to external drivers but I think I do need to go for at least the bigfoot drivers. Thoughts?