ArduPilot Plane 'aerobatic' mission

Hi. Is there still anyone interested in adding aerobatic maneuvers to autonomous missions?

I would like to add something quite ‘simple’ (:slight_smile:) - have two waypoints. Fly from A to B, and at B perform a half loop. Then fly back to above A inverted, and perform a half loop finishing at A. Something like this:
A… … … …B

Where to start?