RE: Airspeed indicator?
In a short amount of time, you will be able to see when a plane is about to stall out.
Trainers almost won't stall out. It's that Mustang, Corsair, Jet, Twin or other very cool plane, that you would really want it on, however by the time you are flying at that level, you should be able to see it, before it happens.
Just like you take check rides in full scale birds, you need to learn how to fly each type of airplane, too.
Still have that Galloping Ghost?