That's a great article too, not just a great picture.

Back to topic, do be wary of using overweight implements. Other than the caber, all an overweight implement teaches you is to be slow, and you can do fewer reps and increase chance of injury.

Lighter weights, faster speeds, and more repetitions are the way to go for event specific training. Throwing in several full weight attempts is good practice too, to help get the timing correct and remember the 'feel' of the implement.
I swear that 56lb weight catches me by surprise every time I pick it up.