If you really want to put something together as E-AB, you'd want to start off with an unbuilt one in kit form, I'd say. Once built, it is what it is, as they say.Would this gyro have to be completely torn apart and then put back together to be clear of it's current "Experimental exhibition" status?
Anybody who intends to fly an aircraft somewhere for display, or to demonstrate it in flight for an event, has to stay in practice to be safe and to keep up with recent flight experience legal requirements. Practice to maintain those skills is what I meant by "proficiency", and it's a term the FAA likes to use for such things. The FAA recognizes that practice is both necessary and awkward to schedule far in advance, and that frequent practice is good for safety, so they allow you to fly an Experimental - Exhibition aircraft whenever you wish and as much as you like to stay sharp with your skills, so long as you stay close to your home base of operations. How far from home they will let you go while practicing is the operating radius I mentioned. If you want to take a trip farther than that, you need to have it pre-listed in your annual program plan.Ok, how what I go about finding out the "operating radius" of this gyro?
And what do you mean exactly when you say, "proficiency flying"?