Tony, I've had two 7lb weights drilled out. They work fine on the Losmandy as long as you have someway to restrain them. eg between two other losmandy weights. You could sit it on the top of an existing weight but as the night progresses the DB weight might tend to roll around the center of gravity.
I had mine done in a machine shop (not by me though) and drilling them out was np at all.
In the mean time you could try this.
http://www.iceinspace.com.au/forum/a...wse.php?a=3047
