Aardvark_Rich....,
Thanks for the GREAT solution to this problem!! We've had this toilet for about four years, and for the most part it has been "working" fine (few annoying problems with the handle falling off, and the flush valve "leaking"..., but the pressure assist worked great. Haven't used a plunger in four years).
Anyway, finally the actuator shaft did break, and I wasn't about to spend $124 (or now $200) on a replacement tank, or even $44 for a new valve. I implemented your idea for $1.53 (brass screw and fitting) and so far it is working great!! I did however, have to make one modification to your fix. I had to add a small amount of epoxy to the brass fitting just to seal it. Without that, I was getting a slight pressure leak through the pin and brass fitting, and the tank would never stop "gurgling". Anyway, that did the trick.
Thanks again for saving me a couple hundred bucks!!!!
Roverdog