Breeding tips for quaker parrots?

Here is an excellent article on breeding Quaker parrots (did you know that in the wild, they are communal breeders? In fact, they are the only psitticines who build communal nests!)

http://www.birdsnways.com/wisdom/ww30eiv.htm

According to this article:

"Drawing on our personal experience, we found that colony breeding in our captive setting was not nearly as productive as it is when Quakers breed in their natural habitat. After experimenting with colony breeding for nearly a year and experiencing a drastic reduction in the number of eggs laid as well as the survival rate, we abandoned this method and returned to our initial—and much more productive—single-pair-to-a-cage method. We provide 3x3x3 cages for each pair constructed of 18 gauge welded wire (due to their extremely strong chewing ability) suspended from the ceiling with chain. We hang a cockatiel-sized nest box made of 24 gauge metal (also due to their chewing ability!) on the upper half on the end of each cage, and provide them with plenty of straw, twigs and branches with which to construct their nest. Metal nestboxes are sometimes used because they can be disinfected with a bleach solution and reused from one season to the next. Some pairs have done just as well with simple untreated pine shavings as a nesting material in a Cockatiel or conure sized pine nestbox. Like most other birds, Quakers prefer to be left alone during the incubation and nesting periods, and will protest quite loudly if disturbed. We have been known to peek in nestboxes using a flashlight or candling device for a quick look, but it is advisable to refrain from handling eggs or hatchlings unless you are prepared to pull them and care for them. Some Quakers will abandon eggs and/or babies or even destroy them if they have been handled by humans, although this is not always the case.
An adequate amount of calcium must be consumed by hens for them to lay, and in some cases calcium deficiencies in hens will cause them to eat the eggs they have laid (egg shells contain calcium). If this occurs you can remedy the situation by adding a calcium supplement to their water or food, providing a cuttlebone for them to chew on, or providing oyster or egg shells which can be purchased at any pet food store or pet shop."

Good luck with your Quakers! By the way, did you know they are not legal in every state? Here is a list of the legal status of Quakers in each state:
http://www.quakerville.net/qic/statelaw.asp

can you mate a quaker with a cocketial