Before revision:  Reversible bond formation plays a major role throughout the assembly process by helping avoid incorrect assembly, and while there is a preference for compact structures during the early phase of cluster growth, as shells near completion structures with a variety of forms are encountered .
After revision:  In certain respects the growth of size-60 shells from trapezoidal particles resembles the growth of icosahedral shells from triangular particles studied previously, with reversible bonding playing a major role throughout the assembly process by helping avoid incorrect assembly, and while there is a preference for compact structures during the early phase of cluster growth, as shells near completion structures with a variety of forms are encountered .