(BA213 case, about 110 pounds, give or take)
My large shipping experience (to another lister) involved a trip
to Home Depot for smallcell semihard wall insulating foam.
Makes a great inside the crate shock absorber and is cheap
enough at the Home Depot scale. Of course while you are
there you get the rest of the crating materials: Plywood, 2x4,
nails/screws.
John A.