Large sewing kit weighs 3.0 in the beta. It should be 0.4 on classic release.
EDIT: Added patchnotes - Thank you dekova
http://everquest.allakhazam.com/hist...es-2001-1.html
We will be increasing the weight of portable 'combine' containers
somewhat. Where some of these containers weighed under 1 pound, they
will now weigh as much as 4 pounds for the largest sewing kit.