I did some searches on the various ways to raise a widow sack, but haven't been able to find any solid gestation times from egg to sling. I want to leave the sack with momma for as long as possible and then move it to another container before it hatches. I'm looking to get a half dozen or so widows out of the clutch (momma is a BIG girl so I'm hoping to get some monsters). How long can I keep them in the container without running into the risk of them hatching in there with her? Thanks!