yup.... the concept of the one wire is cool but it just isn't worth the possible headaches they can cause..... specially at the prices the good ones cost.... like the MSD one that costs $349..... and can you think of how often you've really needed a 100 amp alternator anyways? i have a 65 amp in my mustang, powers my tribar headlights, HEI ignition, power windows, alarm, stereo head unit, and 1000 watt amplifier with no problems at all