There isnt a downsize to waiting for your 2011 to gain in size. Just because she would be up to size doesnt mean her sexual organs are physically ready to produce. Plus your chances of a larger clutch are more likely.
As far as your rescue goes I think it would depend on what kind of conditions she was living in. If she was just underfed I dont see a problem as long as she now will have better muscle growth and is healthy. But if she were to have any deformaties or such from being a rescue then I would stray away from breeding.