I personally never use balls that come with the game even NIB games. I always get the Premium ultra gloss ball from pinball life, and always have at least 10 on hand. I never had a problem with them. One of these days I'll try silver jets, I hear good things on those as well. As others have said a poor finish can do some damage. Not sure what shipping is to Canada but for the price of a machine I wouldn't chance it.