Looks good.
I am slowly working on the same model.
I printed the crescents on some cardstock at first and noticed like you that they did not seem very sturdy even when laminated together so I reprinted them on some stiff Bristol board. Going to use those instead.
Did you notice that the slots to put the building bases on the crescent did not seem long enough? I cut a little bit down on the lines between the lettered sections on the crescent so the base of the building would slide far enough down to get the two tabs on each lettered section on the crescent to line up with the top of the bulding base that gets glued to the crescent. There is a drawing in the instructions that shows those bent out tabs lining up that way.