I get the "don't run for extended times" etc but why do you need a other than street box in the first place?
Are you racing every day?
Electronics do not like being tied in parallel so IMHO every wire would need to be on a relay. The pickup wires MIGHT not take too kindly to a relay??
Also switching mid flight MIGHT be really bad, MIGHT fire a plug just by switching????
Seems like there are so many other alternatives.
