Jerry Faychak wonders whether he’s already seen his best best days jackpot wins and casino gambling — and whether the IRS soon will make things worse for players and casinos alike. An Internal Revenue Service idea to require reporting of slot jackpots of $600, half the current threshold of $1,200, “doesn’t reflect reality,” says Faychak, who retired after 50 years with Westinghouse, most of that time in research and development. He and his wife, Shirl, have gambled throughout the United States, Canada and the Caribbean since the ’80s. “Thirty years ago, if you won $1,200 you were thrilled. We could…