I do know that the Aerobat, F-36 and Skyfox were sold as a "Progressive Train", so yes, they were factory stacked.
I also know that the control rod bridle was optional. My F-36 (my very first stunt kite) had a 3-point bridle, and I remember a friend who had a similar Aerobat.
I actually modded my F-36 to take standoffs.
Helped a bunch when the wind lulled - down to modern standard-kite wind ranges - so it didn't immediately fall out of the sky.
Those were the days - or were they?