Well, I ordered (8) of the 1-pound soft dive weights. I have some zip-lock bags with playground sand that I've used for a while (and re-bagged every time the baggie split a seam [:@] ) and they weigh just under 2 pounds each, so I figured to get the 1-pounders to let me spread it around a little more evenly on a wing or a fuse. I'll let you know when they arrive, what I think of them.