Advanced handling courses can be had for how to get the most out of a typical trainer such as a Cub up to the fly by wire glass cockpit in the modern jets.
I used to teach an advanced airplane handling course called " High command control " that we used to train new aerial applicator pilots.
The course did not include aerobatics as aerobatics are not part of aerial application...however after twenty five hours of training in high command control you " will " be able to fly the airplane on its limits safely provided you pass the course.
By the way when I was training pilots for the job of fire bombing we used some of the high command control techniques as part of the training course.
I may get bored soon and start offering the course as a part time hobby sort of thing.
If I use the Cub as a trainer I can get the hourly rate down to about $300.00 Canadian per hour because the Cub is so cheap to operate.