Sorry and no offense but it sounds like you scammed yourself by being an uninformed buyer. I'm guessing that you bought your game from an Individual rather than a distributor that could help you with your problems right?

Also had you done your homework you may have stayed away from KISS in the first place because that game had some playfield problems that would have probably scared me off from buying a four year old NIB game that had no warranty at all. I would rather buy a used one that I can see in person and look the playfield over for any clearcoat problems.

As far as tweaking, adjusting, and tinkering to get things right....well that's pinball. I do agree somewhat with you that their testing and quality control could and should be much better than what it is but there is always tinkering and adjustments that need to be done on these games seems like.