Hello ScottA, This could be a hierarchy problem: When you modify a dial in body part "steeringWheel", Poser updates all children, and the immediate parent of "steeringWheel". But the parents of the parent body part aren't automatically updated. You need to nudge a dial in the parent body part, to force an update event. If body part "frontWheel" is neighter the immediate parent nor a child of "steeringWheel", then "frontWheel" won't be updated, when you move a dial in "steeringWheel". Therefore, if the master and slave channels are placed in different body parts, then the slave channel should be placed - either in a child body part, - or in the immediate parent body part. You find a more detailed description of this effect in my ERC-tutorial (Part 1). There is also a steering wheel example code in Part 3 or so. You can download the tutorial here http://64.38.105.73/erc_download.html