a couple answers to your questions:
Mine tend to like the ground nesting boxes more then the wall mounted ones. I began using ground nests when they began flying over my 7' fence to lay eggs under my porch steps. It seemed to do the trick! They still fly over, but leave the eggs where they belong at least Lol
Which brings me to the point that they are wonderful flyers! Clipped wings just add a challenge and my worst flyers have learned to flap and climb, all in the name of coming out just to visit. So if you want them to stay put, make sure the run has a top!
Roosting time is interesting, if given a choice they'll be on the roof, a tree or anywhere as high as possible! Guidence while they're young seems to do the trick for us.
My flock will fly over the fence when I pull in and several jump in the car while I'm trying to get out, never have I had a breed be this friendly and intelligent.
On the breeding side of things, it's like Easter every three weeks, you just don't know what's going to pop out of the egg.
"Bad" things may be inbreeding depression- the gene pool isn't exceptionally large. Split wing & comb sprigs can pop up a bit more often with these birds. Personally I've had minimal trouble with this, but have heard others have had bad luck.
Edited by Raven625 - 1/21/16 at 1:52pm