Hot Ball is a "Taito version" of Eight Ball (Bally 1977)
As it is an SS rare table, there is no ROM available and this backglass uses Bally ROM.
The main difference is that Bally displays the 2 digit mach number using "ball in play" display, and "credit" diplay has 2 digit, so i decided the background has been modified making this two display bigger.
For best result i used Bally light ID, but because of this some parts of backglass can't work as should.
Taito backglass has simple inner illumination, so i add some lights like in Bally as fantasy mode
Thanks to Carlos for images and fonts.
And let's hope that someone will find and share Taito ROMS.