My son and I are attempting to build a CNC router. We decided to go with the Arduino due to low initial investment plus being able to learn about wiring/electrical circuits etc. We are trying to determine what size motors we can use with the Arduino paired with the Gshield. I initially ordered these... http://www.ebay.com/itm/331517151618?_trksid=p2057872.m2749.l2649&ssPageName=STRK%3AMEBIDX%3AIT They are rated at 2.8 amps and the Gshield is rated at 2.5. I have found a lot of what seems to be conflicting information on whether these would work or if they would fry the shield. Does anyone have any input on what motors to use and or how to calculate what motors will work? I would like to use the largest motors that would work well with that shield.