I love the Edgerunner concept, but fear that Edgerunner's rated 350# limit for rider and gear (including motor and batteries) suggest it is built relatively flimsily compared to the Big Dummy and Yuba Mundo frames. I've been discouraged by the light and slender build appearance of the Extracycle gear I've seen thus far.
I weigh 275# and carry a 104V Ah Headway 32S setup to run my HT3525 with a 20.8" diameter tire.
I'd rather use a heavier duty frame like the two mentioned with 2.5" 16" motorbike tires front and rear with a 145mm crankset.