As a PI Recalculator Subsystem end user, I need the PI Recalculator Subsystem to support recalculation of PI Performance Equation tags with point sources other than 'C'. This feature would be especially useful because of the PE Scheduler service startup performance issues associated with not assigning a unique point source to each PE Scheduler instance as described in KB00296 - Best Practice: Assigning a unique point source for each instance of an interface.