I think the trouble with using fluid-o-tech style pumps (I actually started out by buying one) is that they're really optimized for machines where the space, cost, and weight of the pump aren't a significant concern, so they can get away with using a giant slow AC motor with big gears. That sort of motor unfortunately doesn't scale down too well, so instead we use a small DC brushless motor and spin it very fast, and then even with the power supply it still ends up being a smaller and cheaper setup.
I think the trouble with using fluid-o-tech style pumps (I actually started out by buying one) is that they're really optimized for machines where the space, cost, and weight of the pump aren't a significant concern, so they can get away with using a giant slow AC motor with big gears. That sort of motor unfortunately doesn't scale down too well, so instead we use a small DC brushless motor and spin it very fast, and then even with the power supply it still ends up being a smaller and cheaper setup.