You're right, someone has replaced pinball mechanism with SYS1 !
Whether it is good or not, is a question for discussion : ))
The easiest (and most expensive) way is to buy "original" mechanism
Greetings from Croatia
edit:
at the moment more and I'm not sure whether it is on Bone Buster still original mechanism,
transition to the "new" mechanism was either then, or at Camera Action
I'll check