A few years ago I built a 4'x4' cnc using hi torque nema steppers and a sparc xpro v2 board. Currently I can only run the steppers at max speed of 160"/sec. That is as fast as I can go before it cuts out. I assume it is because the board doesn't have enough power. So here are my questions. Can the new black box controller run these steppers faster. I see it has more amps. Also I was looking at adding limit switches. I was looking at the xtension limit kit. But I am not sure these will work with my xpro board. These require 3 wires and the switch connectors on my board only accepts 2 wires.