Would it be wise to have lord derbys with cockatiels

[Niousha]

I currently have a 6x4x3 meter aviary housing 5 cockatiels and a few finches. I wanted to introduce my 2 lord derbys as i'd like them to have a larger enclosure to play around. Would mixing the 2 species be a problem?

 

[expressmailtome]

In theory, it is possible that it would work, but during breeding season the Lord Derbyan's may become much more territorial, and if a cockatiel, or finch, lands next to them, be it to try to get food, water, or even just a perching spot, they may be injured.