Those settings all look pretty good to me actually. Acceptable temps, not trying to print too fast, correct extrusion widths, etc.
Is it possible this is a mechanical issue? Back in the day when I was using homemade printers, this type of banding was a constant challenge. If any piece of the structure isn't perfectly rigid, the nozzle would shift ever-so-slightly, which would cause one layer to bulge out slightly. It looked exactly like the picture you posted. The printrbots use a lot of long cantilevered motion systems too, so that seems like a definite possibility.