I hope you dont get discouraged with some of the comments on your thread.. It looks like it got side tracked... MOST people mean well, but there are others that are here to just cause trouble and to take the focus off of you and onto them...
On a different note... I LOVE your set up... Do you have other pics of your pens? What other birds do you raise? Have you come to a solution with your aggressive drake?
I had an aggressive call drake that I rehomed because I couldnt get him to get along with the rest of the flock and was realy aggressive to the younger birds... He left the chickens alone, but then again the chickens were lots bigger than him..He was a chubby bird, but being a call duck, there wasnt enough of him to make him dinner... LOL...