For each cluster with at least one member of length >= 500:

	If only the representative has length >= 500 (or there are no non-representative members):
    
		duplicate the representative
        
	else:
    
		add the highest pLDDT non-representative member with length >= 500

52196254 representatives originally

duplicate 3946647 representatives

add 2961293 cluster members

Final length: 59104194

Note that the original cluster representatives are chosen by highest pLDDT irrespective of length (in AFDB50).