First "fast" print I've done since getting the printer up and running. 200mm/s all around, 9k accel. Still need to calibrate flow, but the rapido hotend has no troubles at all at this speed.
I'm reaching the limits of the voron zero hotend's cooling capablity though (those tiny 30mm fans on full blast lol), but with ABS, it's just barely enough.
More info coming soon, including CAD files!