I could not find a place to enter a different distance between superchargers. Also, it seems we need to be able to set the "min distance between superchargers" so some of them can be skipped. As applied to the East coast through the NYC area, I find that evtripplanner is sending me to a supercharger much more often than necessary, and I couldn't get it to recalculate things after removing the unnecessary ones, without putting them back in again.
Thanks much for this effort! I hope you get bought out by Tesla so they can put your product into their navigation software.