He was able to make translucent ball-tops at one time, too. Wonder if he'd be able to machine the shafts to fit a T-stick plus...hmmm...has anyone heard what his ETA on Wico-style shafts is?
Coleman
What would be really cool would be a universal ball top handle that could be fitted to almost any modern joystick.
Most joysticks currently being manufactured have a 10mm diameter steel shaft (the only exceptions I know about are the original Wico and the perfect 360 both of which, according to Oscar, have a 9.5mm shaft). So it should be possible to manufacture just one type of handle with a 10mm shaft. You could then cut a variety of different grooves into the shaft at different positions for all the different joysticks out there. The circlip would be fitted to a different groove depending upon which type of joystick base you were using the handle with. With a spacer you could even make them height adjustable.
A universal shaft might actually end up being cheaper than one designed for a specific joystick because of larger economies of scale in the manufacturing process.