Wynette, yes that is the male I was looking at.Don, are you referring to the black copper in the background of the middle picture?
rollout/trap nests - are you using your barrels? There is a thread on here by member Opa with plans for a rollout nest box, I wonder if they might be helpful to you in making your trap nests/rollouts?
I looked at the trapnest you mention and went on line and look at some more, I decided to go with the old Cornell trap nest in one of the old books I have. I have to add the roll out part. Making a one hole one first as most that use single matings will be able to get more eggs before they are broken. One of my hobbys is woodworking and sometimes I am my own worst enemy.