Be sure to impress on the seller that the removal of ALL the mass loading material before shipping is important.
A 25% full compartment is worse than a 100% full one. Think of the pile driver effect as the fill material moves around. They'll also cost less to ship if completely empty.
A 25% full compartment is worse than a 100% full one. Think of the pile driver effect as the fill material moves around. They'll also cost less to ship if completely empty.