I figured out how to set the CV's to equal speed or at least real close on 3 Athearn Genesis SD70Mac's Now for the problems!:cry: 1. On 24" Radius curves the 2 front motors come uncoupled not all the time or even on the same spot of a curve but they rarely make a complete circuit around the main without comin' apart. I have replaced the factory couplers with KD#5's and that didn't help...would a longer shanked coupler help? 2. The rear loco is matched in speed to the front 2 but on grades it is pushing the rear cars to fast as the lead loco's slow down on the grade and causin' derailment's at about 2-3 feet past the point of transistion from flat too 2% up....it doesn't do it on downgrades as the lead loco's are just as fast. Anybody have a suggestion for a fix?