The controller is your computer. If you go for the G203Vs you have idiot proof drives. Unkillable!
I bought, paid for and built four other four axis drives and watched them smoke for one reason or another one at a time.
I've bought 5 (one for a spare) G203Vs and had to send one back for adjustment. (no cost other than shipping)
You get what you pay for with Gecko. Quality equipment (the kind of quality that flies on the shuttle) at a bargain price. We are his proving ground and industry the bread and butter.
Let me hasten to say that I don't nor never have I ever, worked for Gecko or any other electronics firm. I'm just an old retired dumb cluck user up in Bakersfield, Ca. poking about in my favorite hobby. ......and I am one HUGE Gecko 203V fan!
Him what has ears, let him hear!