Karma, in the Land of Vos site, in an article "Eclectus Species Profile" by Carolyn Swicegood, under Size and weight characteristics she says:
Dr. Clubb [Dr. Susan Clubb, avian veterinarian and researcher] averaged the weights of adults of the most commonly available Eclectus subspecies and published this range in the reference book, "Psittacine Aviculture". According to Dr. Clubb, the average weight of the adult male Eclectus is 430 grams with a range of 388 to 524. The average weight of the adult female Eclectus is 452 grams with a range of 383-549 grams.
The complete article is at:
I read elsewhere that the SI are the smallest of the Eclectus, with an average weight of 325 to 425 grams, but it didn't separate male and female.
Karma, this might give you an idea until someone who knows what they are talking about comes along!
Abby