Iso-Puck Question

For a CDP that weighs 30 lbs, would I bet better with 5 Iso-Puck Minis (each bears 6 lbs) or 3 Iso-Pucks (each bearing 20 lbs)?  So with the Mini's it would be at the suggested weight limit (unless I use 6, which would have max weight of 36 lbs) or half the weight max using the Iso-Pucks (30 of the 60 lbs).

Thoughts?

Thanks, and stay safe.