Attached Link: http://www.renderosity.com/mod/forumpro/showthread.php?message_id=3752382&ebot_calc_page#message_3752382

Wouldn't using "valueOpTimes" be the appropriate thing for this.

When the master dial is 0, the slave dial final value will be 0 no matter what.
If the limits and trackingScale are set right, the master would act like a switch on the slave.