A LOTTO machine uses balls that tumble etc
Funny you should mention the tumbling balls. Ever wonder why "During a live lotto event." They always say the machines have been monitored for a half hour before the pull? There was a lottery scandal involving the some lotto officials "wetting" all balls except the a few. The wetter balls being heavier would not pop to the top for daily numbers (3 and 4 ball type pulls). Very smart gamble. The balls would dry out by the time they were checked again.
Back to casino's again. All dice are weighed/balanced/spun on all axis/sized. Before they are shipped and again at the casino retested.
True random is the holy grail of science. BTW, the oldest set of dice ever found were tested. Wanna guess what they found...... "loaded".