LMConfig - More control over config retrieval time

Currently, a ConfigSource only provides a limited choice of options for when to collect a device configuration (1 hour, 4 hours, 8 hours, 1 day).  There is not control over when the collection occurs and it appears to automatically happen at or around midnight of each day.  We have 1,000+ network devices and we are seeing frequent config retrieval failures, and we suspect it is because the Collector is trying to do too much at once.  We are distributing the load to a second Collector, but with a couple of hundred, some collections fail.  Sometimes it's just one of the four Cisco configs, other times all four fail.  

The request is to be able to somehow tell the Collectors to stagger their config collections.