Single drum rollers 2017 1,166 h United States, Lincoln, Nebraska
Twin drum rollers 2019 2,318 h United States, La Vista, Nebraska
Twin drum rollers 2018 2,822 h United States, La Vista, Nebraska
Single drum rollers 2022 1,294 h United States, Omaha, Nebraska
Single drum rollers 2017 862 h United States, Lincoln, Nebraska
Single drum rollers 2021 260 h United States, Lincoln, Nebraska