I've been doing cricket batting coaching for District level junior players. I used the same drills with an impact bag with cricket bats - heavy things for you American readers
Small biffs to begin with and then let them do Happy Gilmores at the bag to get footwork happening.
What always amazes me is how far a golfers lead foot slay open doing that, even with a step drill vs a standard foot position. Many end up with a light bulb that in their standard set up routine that they need more to keep a better balanced finish.
Needless to say, the cricket coaching fraternity pooh poohs "The Cricket Machine" but I've kids in the State Development team punching above their age weight. Thanks Homer!