There, I said it! I know what most of you are going to say: Well, it was perfectly fine for moustache-wielding machos of the day!
I say: Well, it's damn small!
My palm is large, but I never use XL working gloves. And with B8, assuming the dimensions of the 3D model are fine, I could almost put my thumb on the very top of the stick, almost over the 4-way hat.
Then with the middle section, there's only ONE finger I can fully wrap around on it and I wouldn't call it a power finger... A relaxed-grip thumb rests on the dogfight switch to a large degree. Pinkie - at all times on the nose wheel steering
The 3D model
https://www.thingiverse.com/thing:5764003