I'm a pinball fan, and I own a TZ since 2003, my only pinball and one that will never leave my home.
I remember in RGP when the 9.4H/BH/CH was hot topic, and some minutes ago I came to my mind that story, and I searched that famous message, https://groups.google.com/d/msg/rec.games.pinball/5exaK_Q8-Pc/70Tl7ojZvBAJ
I can't be more sorrow for what TZ could be more than actually is. Believe me, I would still love to have a proper "street level" 9.4, with home features removed and coin working.
"Also note that I introduced lots of bugs along the way. I was working with
source code and a debugger. I wasn't reverse engineering and changing bytes
in the ROM. I was working on source code of which I wrote a significant
portion. Let me repeat my point to drive it home for the one or two of you
who missed it: I introduced bugs."
"As it turns out, 9.4H has a few
minor bugs that were discovered by the people who upgraded. I have been
(slowly) fixing those bugs in anticipation of a 9.5 release."
I think many TZ owners would be more that interested in a 9.5 final release.
That message is from 99. Have his position changed in 16 years? If he would do that, can he use the original Williams development kit and source code?