Quoting is being wonky right now.. great idea on those gear ties.
Congrats on completing another extremely nice coop.
As for roosting, you can try putting them on the roosts just after dark. If you really would like for them to roost off ground, I would recommend doing it this week, don't let them to get settled in first then trying to change it... otherwise they might form a very hard to break habit in their new home.
for your eggs to hatch well!