Poor silkie!
Come to think of it, my EE never spent long in the nestbox but my Orpington and RIRs took forevever!
That's cool that you have the coop so close to the house! Haha mine is a bit further than that so it's not so easy to get the eggs as soon as they lay them! Well, I guess it isn't...
One of my Buff Orpingtons and one of my RIRs would lay huge eggs, but they were never egg bound. You shouldn't have trouble ... unless you have a tiny little hen! :)
My Orpington hen is a very good layer; I get pretty much an egg every day from her, and she is two years old. My EE, RIRs, and Barred Rocks are pretty good, too.