Panini America's heavily anticipated 2019 Select Football dropped earlier this week and brought with it those calling-card attributes that have made the product a late-season NFL staple for years, including must-have RPAs, the scarce, potential-packed XRC redemptions and XRC Mystery Autograph redemptions, and that popular three-tiered base set. It's that last attribute, the three-tiered base set, that presents a plethora…