They had an older airliner (Viscount? Caravelle? There I go again) that was still complete, not flyable but had working controls and instruments, and it was powered up electrically, and had a retired pilot in it showing you how it worked. If he was watching you, you could work some of the levers and knobs and switches to see how it felt.
Real quality, then. I remember that there was a lever on the pilot's center console (throttle? flaps? Man, this getting-old gig is tough) that was also tied to a lever at the flight engineers panel behind the pilots. They worked absolutely smoothly, and since I could JUST reach both of them at once, I would move the pilot's lever while my hand was on the flight-engineer's lever. Despite the fact that whatever connection was between them (and considering that it was a '50s design, I think it was mechanical), there was ZERO-ZIP-NADA-NONE play between the two levers, not a thousandth of an inch.
That was pretty good fly-by-wire, that was.