[skidmarks]

We know we would have to use a value way below 1 Ohm to not drop significant load. However, if we can get current sensors we would use them. The only problem is it is too late, by the time they get here the robot would either be shipped, or we wouldn't have enough time to program. If we can find one at a local electronics store (like RadioShack), we will buy a current sensor there. Thank you for your replies.